Connection port: With USB2.0 or above

Transmission mode: 2.4GHz wireless, up to 10 meters

Transmission Power: Less than +4bd

Power supply: Build-in polymer Lithium-ion battery

Charging voltage: 4.4V-5.25V Charging current: 300mA

Operating current: < 15mA (backlit off)

Sleeping current: < 100uA

Net weight: 93g Size: 145*75*13.5mm