Bluetooth 5.1    
AUTO WAKE / SLEEP
WHISPERED
OUITE TYPING & CLICKING
TYPE-C RECHARGEABLE
ABS Plastic
Folded size: 142*95*18mm Tile size: 284*95*9mm
Ultra-thin / Foldable,Working 10m
Built-in 150mA rechargeable battery
Working time about 40 hours, Standby time about a month, Charging time about 2.5 hours
Compatible system: Win/ Android/ Mac OS/ iOS/ Harmony OS.