General
Brand: FirstBlood
Type: Marco Keyboard
Model: B81
Color: Crystal Transparent
Specification
Layout: 75% / 81-Key
Structure: Gasket
Connectivity: Bluetooth 5.0/2.4G/Wired
System: Windows/Mac
Keycaps: Ultra-high PC Keycaps
Keycap Profile: FCSA
Sockets: Kailh Full-key Hot-Swappable Sockets
LED: North-facing 
FirstBlood Ice Star Jelly Switches
Type: Linear 
Operating Force: 38±10gf
Pre Travel: 1.9±0.5mm  
Total Travel: 4.0±0.4mm 
Weight & Size
Product Weight: 1.5kg
Package Weight: 1.86kg
Product Size(L x W x H): 48*22*10cm
Package Contents
1 x FirstBlood B1 Keyboard
1 x Letter Stickers
1 x User Manual
 
 
link review https://www.youtube.com/watch?v=1wHmZ52_7fo