Logitech Plus Wireless Touch Pad Keyboard

Connection Type Logitech Unifying protocol (2.4 GHz) Wireless range: >33 ft / 10m wireless range ? Optional software Logitech Options Battery Battery: 2 x AA (included) Battery: 18 months ? Special Keys Mute, Volume Down, Volume Up Connect/Power: On/Off Switch Key Life Up to 5 million keystrokes Typing noise Within 55 dBA for all keys