... keyboard,combos with good quality,competitive price 1. 2.4 G corresponding with ISM (industrial, commercial, medical industry) frequency automatic ... avoid the interference between the wireless devices2. 2.4 G wireless transmission can reach 10 meters barrier-free distance3. Mouse uses ... battery and receiver)Keypad QTY 3Key route 0.8mmKey force 85±5gKey life 3000,000timesRated voltage/current DC 1. ...