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Dell 14 DC14255: технические характеристики и спецификации

Dimensions and weight

The following table lists the height, width, depth, and weight of your Dell 14 DC14255.

Table 1. Dimensions and weight

The following table provides the detailed display specifications of Dell 14 DC14255.

Description Plastic chassis Aluminum chassis
Height
Front height 16.90 mm (0.66 in.) 15.86 mm (0.62 in.)
Rear height 18.07 mm ( 0.71 in.) 17.31 mm (0.68 in.)
Maximum height 19.90 mm (0.78 in.) 18.90 mm (0.74 in.)
Width 314 mm (12.36 in.) 314 mm (12.36 in.)
Depth 226.15 mm (8.90 in.) 226.15 mm (8.90 in.)
Weight
NOTE:The weight of your computer depends on the configuration ordered and manufacturing variability.
  • Minimum: 1.54 kg (3.39 lb)
  • Maximum: 1.69 kg (3.72 lb)
  • Minimum: 1.56 kg (3.43 lb)
  • Maximum: 1.65 kg (3.63 lb)

Processor

The following table lists the details of the processors that are supported by your Dell 14 DC14255.

Table 1. Processor

The following table provides the various processor options that are supported for Dell 14 DC14255.

Description Option one Option two Option three Option four
Processor type

AMD Ryzen AI 7 350

AMD Ryzen AI 5 330

AMD Ryzen 7 250

AMD Ryzen 5 220

Processor wattage

15 W

15 W

20 W

15 W

Processor total core count

8

4

8

6

Processor total thread count
NOTE:Intel Hyper-Threading Technology is only available on Performance-cores.

16

8

16

12

Processor speed

Up to 5.00 GHz

Up to 4.50 GHz

Up to 5.10 GHz

Up to 4.90 GHz

Processor cache
  • L2 Cache: 8 MB
  • L3 Cache: 16 MB
  • L2 Cache: 4 MB
  • L3 Cache: 8 MB
  • L2 Cache: 8 MB
  • L3 Cache: 16 MB
  • L2 Cache: 6 MB
  • L3 Cache: 16 MB
Integrated graphics

AMD Radeon 860M Graphics

AMD Radeon 820M Graphics

AMD Radeon 780M Graphics AMD Radeon 740M Graphics

Chipset

The following table lists the details of the chipset that is supported by your Dell 14 DC14255.

Table 1. Chipset The following table lists the details of the chipset that is supported by your Dell 14 DC14255.
Description Values
Chipset

Integrated with the processor

Processor

AMD Ryzen AI 7 350/AMD Ryzen AI 5 330/AMD Ryzen 7 250/AMD Ryzen 5 220

DRAM bus width

128-bit

Flash EPROM

32 MB

PCIe bus

Up to Gen4

Operating system

Your Dell 14 DC14255 supports the following operating systems:

  1. For 220/250 processors
    • Windows 11 Home
    • Windows 11 Pro
    • Windows 11 Education – National Academic
    • Ubuntu Linux 24.04.2 LTS
  2. For AI 330/350 processors
    • Windows 11 Home NextGen
    • Windows 11 Pro NextGen
    • Ubuntu Linux 24.04.2 LTS

Memory

The following table lists the memory specifications that are supported by your Dell 14 DC14255.

Table 1. Memory specificationsThe following table lists the memory specifications of your computer.
Description Values
Memory slots

Two SODIMM slots

Memory type

Dual-channel DDR5

Memory speed

5600 MT/s

Maximum memory configuration

32 GB

Minimum memory configuration

8 GB

Memory size per slot

8 GB or 16 GB or 32 GB

Memory configurations supported
  • 8 GB: 1 x 8 GB, DDR5, 5600 MT/s, single-channel
  • 16 GB: 1 x 16 GB, DDR5, 5600 MT/s, single-channel
  • 16 GB: 2 x 8 GB, DDR5, 5600 MT/s, dual-channel
  • 24 GB: 1 x 8 GB + 1 x 16 GB, DDR5, 5600 MT/s, dual-channel
  • 32 GB: 1 x 32 GB, DDR5, 5600 MT/s, single-channel
  • 32 GB: 2 x 16 GB, DDR5, 5600 MT/s, dual-channel

External ports and slots

The following table lists the external ports and slots on your Dell 14 DC14255.

Table 1. External ports and slots

The following table lists ports and connectors available on Dell 14 DC14255.

Description Values
USB ports
  • Two USB 3.2 Gen 1 (5 Gbps) ports
  • One USB 3.2 Gen 2 (10 Gbps) Type-C port with DisplayPort Alt mode 1.4/Power Delivery
Audio port

One headset (headphone and microphone combo) port

Video port(s)

One HDMI 1.4 port

Media-card reader

One SD-card slot

Power-adapter port

One power-adapter port (4.50 mm standard plug)

Security-cable slot

One wedge-shaped lock slot

Internal slots

The following table lists the internal slots of your Dell 14 DC14255.

Table 1. Internal slotsThe following table lists the internal slots on your Dell 14 DC14255.
Description Values
M.2
  • One M.2 2230 slot for solid state drive
  • One M.2 2230 slot for Wi-Fi and Bluetooth combo card
NOTE:To learn more about the features of different types of M.2 cards, search Dell Support Site.

Wireless module

The following table lists the Wireless Local Area Network (WLAN) module that is supported on your Dell 14 DC14255.

Table 1. Wireless module specifications

The following table provides the wireless module specifications of Dell 14 DC14255.

Description Plastic chassis Aluminum chassis
Model number Realtek Wi-Fi 6 RTL8852BE Realtek Wi-Fi 6E RTL8852CE
Transfer rate 1201 Mbps 2402 Mbps
Frequency bands supported 2.4 GHz/5 GHz 2.4 GHz/5 GHz/6 GHz
Wireless standards
  • Wi-Fi 802.11a/b/g
  • Wi-Fi 4 (Wi-Fi 802.11n)
  • Wi-Fi 5 (WiFi 802.11ac)
  • Wi-Fi 6 (WiFi 802.11ax)
  • Wi-Fi 802.11a/b/g
  • Wi-Fi 4 (Wi-Fi 802.11n)
  • Wi-Fi 5 (WiFi 802.11ac)
  • Wi-Fi 6E (WiFi 802.11ax)
Encryption
  • 64-bit/128-bit WEP
  • AES-CCMP
  • TKIP
  • 64-bit/128-bit WEP
  • AES-CCMP
  • TKIP
Bluetooth wireless card
NOTE:The functionality of the Bluetooth wireless card may vary based on the operating system.
Bluetooth 5.3 Bluetooth 5.3

Audio

The following table lists the audio specifications of your Dell 14 DC14255.

Table 1. Audio specifications

The following table provides the detailed audio specifications of Dell 14 DC14255.

Description Values
Audio controller

Realtek ALC3204

Stereo conversion

Supported

Internal audio interface

High Definition Audio (HDA) inteface

External audio interface

One headset (headphone and microphone combo) port

Number of speakers

Two

Internal-speaker amplifier

Supported (Audio codec integrated)

External volume controls

Keyboard shortcut controls

Speaker output:
Average

2 W x 2 = 4 W

Peak

2.5 W x 2 = 5 W

Microphone
  • Plastic chassis: Single integrated microphone
  • Aluminum chassis: Digital-array microphones

Storage

This section lists the storage options on your Dell 14 DC14255.

Your Dell 14 DC14255 supports one M.2 2230 solid state drive. The M.2 2230 solid state drive is the primary storage drive of your computer.

Table 1. Storage specifications

The following table provides the different storage options available on Dell 14 DC14255.

Storage type Interface type Capacity

M.2 2230 solid state drive, Class 25

Gen4 PCIe NVMe

512 GB/1 TB/2 TB

M.2 2230 solid state drive, Class 35

Gen4 PCIe NVMe

256 GB

Media-card reader

The following table provides the specification of media cards that are supported by your Dell 14 DC14255.

Table 1. Media-card reader specificationsThe following table provides the specification of media cards that are supported by your Dell 14 DC14255.
Description Values
Media-card slot type

One SD-card slot

Media-cards supported
  • Secure Digital (SD)
  • Secure Digital High Capacity (SDHC)
  • Secure Digital Extended Capacity (SDXC)
NOTE:The maximum capacity of the media-card reader varies depending on the standard of the media card that is inserted in your computer.

Keyboard

The following table lists the keyboard specifications of your Dell 14 DC14255.

Table 1. Keyboard specifications

The following table provides the detailed keyboard specifications of Dell 14 DC14255.

Description Values
Keyboard type
  • Backlit Copilot key keyboard with fingerprint reader
  • Non-backlit Copilot key keyboard with fingerprint reader
Keyboard layout

QWERTY

Number of keys
  • 79 keys (Arabic, English International, English US, French Canadian)
  • 80 keys (Belgian, Bulgarian, English UK, French European, German, Italian, Nordic, Spanish, Swiss European)
  • 83 keys (Japanese)
  • 81 keys (Brazilian)
Key pitch

Horizontal = 19.05 mm

Vertical = 18.05 mm

Keyboard shortcuts
Some keys on your keyboard have two symbols on them. These keys can be used to type alternate characters or to perform secondary functions.
  • To type the alternate character, press Shift and the desired key.
  • To perform secondary functions, press Fn and the desired key.
NOTE:You can define the primary behavior of the function keys (F1–F12) by changing Function Key Behavior in the BIOS Setup program.
NOTE:If Copilot in Windows is not available on your computer, pressing the Copilot key launches Windows search. For more information about Copilot in Windows, see the Knowledge Base Resource at the Dell Support site.
For more information, see Keyboard function keys.

Keyboard shortcuts of Dell 14 DC14255

NOTE:Keyboard characters may differ depending on the keyboard language configuration. Keys that are used for shortcuts remain the same across all language configurations.

Some keys on your keyboard have two symbols on them. These keys can be used to type alternate characters or to perform secondary functions. The symbol that is shown on the lower part of the key refers to the character that is typed out when the key is pressed. If you press shift and the key, the symbol that is shown on the upper part of the key is typed out. For example, if you press 2, 2 is typed out; if you press Shift + 2, @ is typed out.

The keys F1-F12 at the top row of the keyboard are function keys for multimedia control, as indicated by the icon on the key. Press the function key to enable the task represented by the icon. For example, pressing F1 mutes the audio (see the table below).

However, if the function keys F1-F12 are needed for specific software applications, multimedia functionality can be disabled by pressing Fn + Esc. Later, multimedia control can be invoked by pressing Fn and the respective function key. For example, mute audio by pressing Fn + F1.
NOTE:You can also define the primary behavior of the function keys (F1–F12) by changing Function Key Behavior in the BIOS setup program.
Table 1. Function key primary behavior

The following table lists the keyboard shortcuts and their descriptions.

Function key Primary behavior
F1 Mute or unmute audio
F2 Decrease volume
F3 Increase volume
F4 Play or pause
F5 KB Illumination/Backlight
F6 Decrease brightness
F7 Increase brightness
F8 Switch to external display
F10 Print screen
F11 Home
F12 End

The Fn key is also used with selected keys on the keyboard to invoke secondary functions.

Table 2. Secondary behaviorThe following table lists the secondary behavior of each key with the Function (Fn) key.
Function key Secondary behavior
Fn + F1 Operating system and application-specific F1 behavior
Fn + F2 Operating system and application-specific F2 behavior
Fn + F3 Operating system and application-specific F3 behavior
Fn + F4 Operating system and application-specific F4 behavior
Fn + F5 Operating system and application-specific F5 behavior
Fn + F6 Operating system and application-specific F6 behavior
Fn + F7 Operating system and application-specific F6 behavior
Fn + F8 Operating system and application-specific F8 behavior
Fn + F10 Operating system and application-specific F10 behavior
Fn + F11 Operating system and application-specific F11 behavior
Fn + F12 Operating system and application-specific F12 behavior
Fn + Esc Toggle fn key lock
Fn + S Toggle scroll lock
Fn + B Pause or break
Fn + R System request
Fn + P Privacy screen
Fn + Copilot Open the application menu
Fn + Space bar Open the emoji menu
Fn + T Toggle ultraperformance mode
Fn + Left arrow Home
Fn + Right arrow End

Camera

The following table lists the camera specifications of your Dell 14 DC14255.

Table 1. Camera specifications

The following table provides the detailed camera specifications of Dell 14 DC14255.

Description Plastic chassis Aluminum chassis
Number of cameras One One
Camera type HD RGB camera FHD RGB camera
Camera location Front camera Front camera
Camera sensor type CMOS sensor technology CMOS sensor technology
Camera resolution:
Still image 0.92 megapixel 2.07 megapixel
Video 1280 x 720 (HD) at 30 fps 1920 x 1080 (FHD) at 30 fps
Diagonal viewing angle 75 degrees 82.20 degrees

Touchpad

The following table lists the touchpad specifications of your Dell 14 DC14255.

Table 1. Touchpad specificationsThe following table provides the detailed touchpad specifications of Dell 14 DC14255.
Description Values
Touchpad resolution:
Horizontal

>= 300 dpi

Vertical

>= 300 dpi

Touchpad dimensions:
Horizontal

115 mm (4.52 in.)

Vertical

80 mm (3.14 in.)

Touchpad gestures For more information about the touchpad gestures that are available on:
  • Windows, search Microsoft Support Site.
  • Ubuntu, search Ubuntu Support Site.

Power adapter

The following table lists the power adapter specifications of your Dell 14 DC14255.

Table 1. Power-adapter specifications

The following table provides the detailed power adapter specifications of Dell 14 DC14255.

Description Values
Type

65 W

Connector dimensions:
External diameter

4.50 mm

Internal diameter

2.90 mm

Power-adapter dimensions:
Height

29.50 mm

Width

47.00 mm

Depth

108.00 mm

Power-adapter weight (maximum)

0.265 kg

Input voltage

100 VAC–240 VAC

Input frequency

50 Hz–60 Hz

Input current (maximum)

1.60 A/1.70 A

Output current (continuous)

3.34 A

Rated output voltage

19.50 VDC

Temperature range:
Operating

0°C to 40°C (32°F to 104°F)

Storage

-40°C to 70°C (-40°F to 158°F)

CAUTION:Operating and storage temperature ranges may differ among components, so operating or storing the device outside these ranges may impact the performance of specific components.

Power adapter requirements of Dell 14 DC14255

NOTE:If you did not purchase the Dell-branded power adapter that is recommended for your computer, ensure that the power adapter you use meets the following requirements.

The following table lists the power adapter requirements for your Dell 14 DC14255.

Table 1. Power adapter requirementsThe following table lists the power adapter requirements for your Dell 14 DC14255.
Description Value
Power that is required from a power adapter to achieve optimal performance 60 W
Power that charges the computer at a slower speed
NOTE:A warning message may appear informing you about the use of a lower-powered adapter and slower charging speed.
Less than 63 W
Minimum power that is required from a power adapter to operate the computer and charge the battery
NOTE:A warning message appears informing you about the use of a lower-powered adapter and slower charging speed.
45 W
USB Power Delivery (PD) fast charging Supported
ExpressCharge mode Supported
NOTE:Ensure that the computer with a 41 Wh battery is connected to a 65 W power adapter for this feature to be supported.

Battery

The following table lists the battery specifications of your Dell 14 DC14255.

Table 1. Battery specifications

The following table provides the detailed battery specifications of Dell 14 DC14255.

Description Plastic chassis Aluminum chassis
Option one Option two Option one Option two
Battery type 3-cell, 41 Wh, Lithium Ion Polymer, ExpressCharge, ExpressCharge Boost 4-cell, 54 Wh, Lithium Ion Polymer, ExpressCharge 4-cell, 54 Wh, Lithium Ion Polymer, ExpressCharge 4-cell, 64 Wh, Lithium Ion Polymer, ExpressCharge
Battery voltage 11.25 VDC 15 VDC 15 VDC 15.20 VDC
Battery weight (maximum) 0.17 kg (0.39 lb) 0.24 kg (0.53 lb) 0.24 kg (0.53 lb) 0.26 kg (0.57 lb)
Battery dimensions:
Height 5.75 mm (0.22 in.) 5.75 mm (0.22 in.) 5.75 mm (0.22 in.) 5.75 mm (0.22 in.)
Width 206.40 mm (8.12 in.) 271.90 mm (10.66 in.) 271.90 mm (10.66 in.) 271.90 mm (10.66 in.)
Depth 82 mm (3.22 in.) 82 mm (3.22 in.) 82 mm (3.22 in.) 82 mm (3.22 in.)
Temperature range:
Operating
  • Charge: 0°C to 45°C (32°F to 113°F)
  • Discharge: 0°C to 70°C (32°F to 158°F)
  • Charge: 0°C to 45°C (32°F to 113°F)
  • Discharge: 0°C to 70°C (32°F to 158°F)
  • Charge: 0°C to 45°C (32°F to 113°F)
  • Discharge: 0°C to 70°C (32°F to 158°F)
  • Charge: 0°C to 45°C (32°F to 113°F)
  • Discharge: 0°C to 70°C (32°F to 158°F)
Storage –20°C to 60°C (-4°F to 140°F) –20°C to 60°C (-4°F to 140°F) –20°C to 60°C (-4°F to 140°F) –20°C to 60°C (-4°F to 140°F)
Battery operating time Varies depending on operating conditions and can significantly reduce under certain power-intensive conditions. Varies depending on operating conditions and can significantly reduce under certain power-intensive conditions. Varies depending on operating conditions and can significantly reduce under certain power-intensive conditions. Varies depending on operating conditions and can significantly reduce under certain power-intensive conditions.
Battery charging time (approximate)
NOTE:Control the charging time, duration, start and end time, and so on, using the Dell Power Manager application. For more information about Dell Power Manager, search in the Knowledge Base Resource at Dell Support Site.
  • ExpressCharge: 2 hours
  • Standard charge: 3 hours (When the computer is off)
  • ExpressCharge: 2 hours
  • Standard charge: 3 hours (When the computer is off)
  • ExpressCharge: 2 hours
  • Standard charge: 3 hours (When the computer is off)
  • ExpressCharge: 2 hours
  • Standard charge: 3 hours (When the computer is off)
Coin-cell battery Not supported Not supported Not supported Not supported
CAUTION:Operating and storage temperature ranges may differ among components, so operating or storing the device outside these ranges may impact the performance of specific components.
CAUTION:Dell Technologies recommends that you charge the battery regularly for optimal power consumption. If your battery charge is depleted, connect the power adapter, turn on your computer, and then restart your computer to reduce the power consumption.

Power requirements (for computers shipped with 3-cell, 41 Wh battery)

NOTE: The information in this section is applicable to the European Union (EU) countries.
Figure 1. Pictogram for 41 Wh battery
Pictogram for 41 Wh battery

The power that is delivered by the charger must be between a minimum of 45 Watts that is required by the radio equipment, and a maximum of 55 Watts in order to achieve the maximum charging speed.

This computer supports USB Power Delivery (PD) fast charging.

Power requirements (for computers shipped with 4-cell, 54 Wh battery)

NOTE: The information in this section is applicable to the European Union (EU) countries.
Figure 1. Pictogram for 54 Wh battery
Pictogram for 54 Wh battery

The power that is delivered by the charger must be between a minimum of 45 Watts that is required by the radio equipment, and a maximum of 53 Watts in order to achieve the maximum charging speed.

This computer supports USB Power Delivery (PD) fast charging.

Power requirements (for computers shipped with 4-cell, 64 Wh battery)

NOTE: The information in this section is applicable to the European Union (EU) countries.
Figure 1. Pictogram for 64 Wh battery
Pictogram for 64 Wh battery

The power that is delivered by the charger must be between a minimum of 45 Watts that is required by the radio equipment, and a maximum of 63 Watts in order to achieve the maximum charging speed.

This computer supports USB Power Delivery (PD) fast charging.

Display

The following table lists the display specifications of your Dell 14 DC14255.

Table 1. Display specifications

The following table provides the detailed display specifications of Dell 14 DC14255.

Description Option one Option two
Display type

14" Full High Definition Plus (FHD+)

14" Quad High Definition Plus (QHD+), ComfortView

Touch options

Not supported

Not supported

Display-panel technology

In-Plane Switching (IPS) with Wide-viewing Angle (WVA)

In-Plane Switching (IPS) with Wide-viewing Angle (WVA)

Display-panel dimensions (active area):
Height

301.59 mm (11.87 in.)

301.59 mm (11.87 in.)

Width

188.50 mm (7.42 in.)

188.50 mm (7.42 in.)

Diagonal

355.65 mm (14 in.)

355.65 mm (14 in.)

Display-panel native resolution

1920 x 1200

2560 x 1600

Luminance (typical)

300 nits

300 nits

Megapixels

2.30

4.09

Color gamut

45% NTSC

100% sRGB

Pixels Per Inch (PPI)

162

216

Contrast ratio (minimum)
  • 600:1 (minimum)
  • 800:1 (typical)
  • 1000:1 (minimum)
  • 1200:1 (typical)
Response time (maximum)

35 ms

35 ms

Refresh rate

60 Hz

120 Hz

Horizontal view angle
  • Minimum: +/- 80 degrees
  • Typical: +/- 85 degrees
  • Minimum: +/- 80 degrees
  • Typical: +/- 85 degrees
Vertical view angle
  • Minimum: +/- 80 degrees
  • Typical: +/- 85 degrees
  • Minimum: +/- 80 degrees
  • Typical: +/- 85 degrees
Pixel pitch

0.157 x 0.157 mm

0.117 x 0.117 mm

Power consumption (maximum)

3.68 W

4.80 W

Anti-glare vs glossy finish

Anti-glare

Anti-glare

Fingerprint reader (optional)

The following table lists the specifications of the optional fingerprint reader of your Dell 14 DC14255.

NOTE:The fingerprint reader is on the power button.
Table 1. Fingerprint reader specifications

The following table provides the specifications of fingerprint reader of Dell 14 DC14255.

Description Option one Option two
Sensor technology Capacitive Capacitive
Sensor resolution 500 dpi 508 dpi
Sensor pixel size

108 mm x 88 mm

108 mm x 88 mm

GPU—Integrated

The following table lists the specifications of the integrated Graphics Processing Unit (GPU) supported by your Dell 14 DC14255.

Table 1. GPU—Integrated

The following table provides the detailed integrated graphics specifications of Dell 14 DC14255.

Controller Memory size Processor

AMD Radeon Graphics

Shared system memory

AMD Ryzen 5 220/AMD Ryzen 7 250

AMD Radeon 820M Graphics

Shared system memory

AMD Ryzen AI 5 330

AMD Radeon 860M Graphics

Shared system memory

AMD Ryzen AI 7 350

Multiple display support matrix

The following table lists the multiple display support matrix for your Dell 14 DC14255.

Table 1. Multiple display support matrixThe following table provides the multiple display support matrix for your Dell 14 DC14255.
Graphics Card Direct Graphics Controller Direct Output Mode Supported external displays with computer internal display on Supported external displays with computer internal display off
AMD Radeon Graphics Not supported 3 4
AMD Radeon 820M Graphics Not supported 3 4
AMD Radeon 860M Graphics Not supported 3 4

Operating and storage environment

This table lists the operating and storage specifications of your Dell 14 DC14255.

Airborne contaminant level: G1 as defined by ISA-S71.04-1985

Table 1. Computer environment

The following table lists the operating and storage environment conditions of Dell 14 DC14255.

Description Operating Storage
Temperature range

0°C to 40°C (32 °F to 104°F)

-40°C to 65°C (-40°F to 149°F)

Relative humidity (maximum)

90% (non-condensing)

95% (non-condensing)

Vibration (maximum)*

0.66 GRMS

Not Applicable

Shock (maximum)

140 G†

Not Applicable

Altitude range

Not Applicable

Not Applicable

CAUTION:Operating and storage temperature ranges may differ among components, so operating or storing the device outside these ranges may impact the performance of specific components.

* Measured using a random vibration spectrum that simulates the user environment.

† Measured using a 2 ms half-sine pulse.

Dell support policy

For information about Dell support policy, search Dell Support Site.

ComfortView

WARNING:Prolonged exposure to blue light from the display may lead to long-term effects such as eye strain, eye fatigue, or damage to the eyes.

Blue light is a color in the light spectrum which has a short wavelength and high energy. Chronic exposure to blue light, particularly from digital sources, may disrupt sleep patterns and cause long-term effects such as eye strain, eye fatigue, or damage to the eyes.

Dell ComfortView software technology reduces harmful blue light emissions to make extended screen time easy on your eyes.

ComfortView mode can be enabled and configured using the Dell CinemaColor application.

ComfortView mode complies with TÜV Rheinland's requirement for low blue light displays.

To reduce the risk of eye strain, it is also recommended that you:

  • Position the display at a comfortable viewing distance between 20 and 28 inches (50 cm and 70 cm) from your eyes.
  • Blink frequently to moisten your eyes, wet your eyes with water, or apply suitable eye drops.
  • Take an extended break for 20 minutes every two hours.
  • Look away from your display, and gaze at a distant object at 20 ft (609.60 cm) away for at least 20 seconds during each break.