1, Bluetooth 5.0
2, Built-in rechargeable lithium battery
3, Battery capacity: **0mah
4, Charging time: less than 2 hours
5, Battery life: 3 years
6, Continuous use time: **0 hours
7, Open size: **4.5**7.*5*8mm; fold size: **2**8**6mm
8, Features: triple foldable, bluetooth connection, small and
portable, **-key design, with touchpad, compatible with etc. system
