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WhatGeek x FirstBlood B81 Crystal Transparent Wireless Mechanical Keyboard

Firstblood B81

The Firstblood B81 Crystal is a compact 75% mechanical keyboard designed for users who want a visually distinctive, transparent design combined with versatile switch customization. It suits hobbyists and gamers who value a unique aesthetic and the ability to swap switches without soldering. Its wireless and wired connectivity options make it flexible for different setups.</p... Read more
Compare prices from $149.00 to $222
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Compare Firstblood B81 vs Keychron 81 Pro vs Fancy V81 Plus Specification

Compare similar keyboards side by side, or use the comparison table to compare all keyboards!
Firstblood B81Keychron 81 ProFancy V81 Plus
74
WhatGeek x FirstBlood B81 Crystal Transparent Wireless Mechanical Keyboard
93
Keyboard 81 Pro QMK/VIA Wireless Custom Mechanical Keyboard
63
Fancy V81 Plus Aluminium Alloy Keyboard Kit
0.0 (0)
5.0 (8)
0.0 (0)
  • Has Linear switch options
  • Supports Bluetooth, 2.4 GHz, Wired, Wireless connectivity
  • Equipped with a 3750 mAh battery
  • Weighs about 1500 g
  • Sized at 100 x 480 x 220 mm
  • Made with a Acrylic case
  • Features PC, PBT, ABS keycaps
  • Offers Yes, North-face, Rgb RGB lighting
  • Has Linear, Tactile, Clicky switch options
  • Supports QMK firmware
  • Supports VIA configuration
  • Supports Bluetooth, Wired, Wireless connectivity
  • Runs at a 1000 Hz polling rate
  • Equipped with a 4000 mAh battery
  • Weighs about 1887 g
  • Sized at 47 x 338 x 151 mm
  • Features PBT keycaps
  • Offers Yes, Rgb, South-face, Rgb South-face RGB lighting
  • Includes a Yes display
  • Supports Wireless connectivity
  • Equipped with a 3000 mAh battery
  • Offers No RGB lighting
Scores
  • Performance: 52.2
  • Build Quality: 61.8
  • Productivity: 91.1
  • Customizability: 79.9
  • Portability: 82.9
Scores
  • Performance: 82
  • Build Quality: 86.8
  • Productivity: 97.3
  • Customizability: 94.9
  • Portability: 81.6
Scores
  • Performance: 43.1
  • Build Quality: 65.3
  • Productivity: 50.6
  • Customizability: 68.1
  • Portability: 78.9
Name
Firstblood B81
Name
Keychron 81 Pro
Name
Fancy V81 Plus
Release year
2023
Release year
2023
Release year
2023
Switch Options
Linear
Switch Options
Linear, Tactile, Clicky
Switch Options
-
Profile
Normal Profile
Profile
Normal Profile
Profile
Normal Profile
Hot Swappable
 
Hot Swappable
 
Hot Swappable
 
Layout Size
75%
Layout Size
75%
Layout Size
75%
Layout Standard
ANSI
Layout Standard
ANSI
Layout Standard
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
Bluetooth, Wired, Wireless
Connection
Wireless
Polling Rate
-
Polling Rate
1000 Hz
Polling Rate
-
Battery capacity
3750 mAh
Battery capacity
4000 mAh
Battery capacity
3000 mAh
Hall Effect Support
 
Hall Effect Support
 
Hall Effect Support
 
QMK Support
 
QMK Support
 
QMK Support
 
VIA Support
 
VIA Support
 
VIA Support
 
VIAL Support
 
VIAL Support
 
VIAL Support
 
N-Key Rollover
 
N-Key Rollover
 
N-Key Rollover
 
Rapid Trigger
 
Rapid Trigger
 
Rapid Trigger
 
Mount Style
Gasket Mount
Mount Style
Gasket Mount
Mount Style
Gasket Mount
Screw in Stabilizers
 
Screw in Stabilizers
 
Screw in Stabilizers
 
Sound Dampening
 
Sound Dampening
 
Sound Dampening
 
Backlight
 
North-face, Rgb
Backlight
 
Rgb, South-face
Backlight
 
Case Colors
Case Colors
Case Colors
Case Material
Acrylic
Case Material
Aluminum
Case Material
Aluminum
Keycaps Material
PC, PBT, ABS
Keycaps Material
PBT
Keycaps Material
-
Dimensions
100 x 480 x 220 mm
Dimensions
47 x 338 x 151 mm
Dimensions
-
Weight
1500g
Weight
1887g
Weight
-
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Product Description

The Firstblood B81 Crystal is a compact 75% mechanical keyboard designed for users who want a visually distinctive, transparent design combined with versatile switch customization. It suits hobbyists and gamers who value a unique aesthetic and the ability to swap switches without soldering. Its wireless and wired connectivity options make it flexible for different setups.

Key Features

  • Full-key hot-swappable Kailh sockets allow easy switch replacement or experimentation without tools.
  • Includes letter stickers with transparent backgrounds, letting users choose whether to display legends on keycaps.
  • Crystal damping knob offers tactile feedback and ergonomic control, beneficial for gaming and precise input.
  • Bluetooth 5.0, 2.4G wireless, and wired connectivity provide multiple connection modes for convenience.

Build Quality

  • Constructed with a precision-drilled acrylic surface for high translucency and durability.
  • Gasket mounting structure reduces typing noise and vibration, improving acoustic comfort.
  • Ultra-high PC keycaps with FCSA profile support a consistent typing feel and durability.

Typing Experience

  • Linear Kailh Ice Star Jelly switches require moderate force, suitable for smooth keypresses without tactile bumps.
  • Gasket mount softens keystrokes, reducing harsh feedback and noise.
  • Customizable switch options allow users to tailor typing feel to personal preference.

Compatibility

  • 75% layout with 81 keys fits compact desk setups while retaining essential keys.
  • Compatible with Windows and Mac systems.
  • North-facing LEDs improve compatibility with keycap designs that have side legends or translucent elements.

Trade-offs

  • Transparent acrylic case may show dust and fingerprints more easily than opaque designs.
  • Linear switches may be less suitable for users who prefer tactile or clicky feedback.
  • Unknown battery life and latency details for wireless modes.

Frequently Asked Questions (FAQ)

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