... Ops distance: 10meters4), Characteristics: Medical Silicone material,power saving,waterproofing,dustproofing,and easytaking5), Function Characteristics: ... 0/1.2/1.110), Ergonomics : Supporting11), Power supply: Built-in charging Li-ion battery12), Surface ... matching: Optional14), Power Switch: Yes15), USB Charging: Yes16), Certificate: FCC,CE,ROHS,SRRCPhoto: super bluetooth wireless keyboard