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Compare Keychron B4 Pro UltraSlim vs V4 Differences Side by Side

Explore the comprehensive side-by-side comparison of the Keychron B4 Pro UltraSlim and Keychron V4 and view their biggest differences. The detailed comparison table allows you to see all the essential features, specifications, and benefits of each keyboard at a glance. Whether you're looking for performance, value, or specific functionalities, this comparison tool helps you make an informed decision. Explore the strengths and unique attributes of each keyboard to find the one that perfectly fits your needs. Start comparing now and discover the best keyboard for you!
Keychron B4 Pro Ultra-Slim Wireless Keyboard - Image: 1
Keychron V4 QMK Custom Mechanical Keyboard ISO Layout Collection - Image: 1
Keychron B6 Pro Ultra-Slim Wireless Keyboard ISO Layout Collection - Image: 1
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5.0 (12)
4.8 (11)
Name
Keychron B4 Pro UltraSlim
Name
Keychron V4
Name
Keychron B6 Pro UltraSlim
Release year
2025
Release year
2022
Release year
2024
Switch Options
Linear, Tactile, Clicky
Switch Options
Linear, Tactile, Clicky
Switch Options
Linear, Tactile, Clicky
Profile
Low Profile
Profile
Normal Profile
Profile
Low Profile
Hot Swappable
 
Hot Swappable
 
Hot Swappable
 
Layout Size
96%
Layout Size
60%
Layout Size
100%
Layout Standard
ANSI
Layout Standard
ISO, JIS, ANSI
Layout Standard
ISO, JIS, ANSI
Layout Ergonomics
Normal
Layout Ergonomics
Normal
Layout Ergonomics
Normal
Knob Support
 
Knob Support
 
Knob Support
 
Display Support
 
Display Support
 
Display Support
 
Mac/Win Support
 
Mac/Win Support
 
Mac/Win Support
 
Multi-Media Keys
 
Multi-Media Keys
 
Multi-Media Keys
 
USB-C
 
USB-C
 
USB-C
 
USB passthrough
 
USB passthrough
 
USB passthrough
 
Connection
Bluetooth, 2.4 GHz, Wired, Wireless
Connection
Wired, Wired only
Connection
Bluetooth, 2.4 GHz, Wired, Wireless
Polling Rate
-1 Hz
Polling Rate
1000 Hz
Polling Rate
1000 Hz
Battery capacity
-
Battery capacity
-
Battery capacity
1200 mAh
Hall Effect Support
 
Hall Effect Support
 
Hall Effect Support
 
QMK Support
 
QMK Support
 
QMK Support
 
VIA Support
 
VIA Support
 
VIA Support
 
N-Key Rollover
 
N-Key Rollover
 
N-Key Rollover
 
Rapid Trigger
 
Rapid Trigger
 
Rapid Trigger
 
Mount Style
-
Mount Style
Tray Mount
Mount Style
-
Screw in Stabilizers
 
Screw in Stabilizers
 
Screw in Stabilizers
 
Sound Dampening
 
Sound Dampening
 
Sound Dampening
 
Backlight
 
Backlight
 
Rgb, South-face
Backlight
 
Case Colors
Case Colors
Case Colors
Case Material
-
Case Material
Plastic, ABS
Case Material
Plastic, ABS
Keycaps Material
ABS
Keycaps Material
ABS
Keycaps Material
ABS
Dimensions
-1 x -1 x -1 mm
Dimensions
20 x 117 x 304 mm
Dimensions
5 x 429 x 130 mm
Weight
-1g
Weight
730g
Weight
623g
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