Product Detail Radio Frequency - 1.9GHz DECT Worn behind the ear 64-bit digital encryption Roaming Range - Up to 300 ft. Headset controls - Volume, mute, call answer/end . The "Plantronics PLCS70N DECT 6.0 Wireless Headset" is best product for you. We recommended Plantronics PLCS70N DECT 6.0 Wireless Headset