Logitech H800 Bluetooth Wireless Headset With Mic

Pc, smartphone and tablet headset: easy to connect and switch between devices rich digital stereo sound: laser-tuned speaker drivers, built-in equalizer and noise-cancelling mic for crystal clear calls and music*. sensitivity (microphone)- -47dbv/pa +/- 3db. sensitivity (headphone)- 97db +/-3db 40 ft. wireless range: listen and chat up to 12 m from your pc-or pair with your smartphone or tablet using bluetooth. input impedance: 32 ohms six-hour rechargeable battery : listen and chat longer with easy usb charging. frequency response (headset): wideband: 30hz to 15khz, narrowband: 40hz to 3.2khz. frequency response (microphone): 100hz to 6,500hz padded comfort: adjustable padded headband and sculpted ear cups for a feel-good fit