Uniden high definition audio and speakerphoneCrystal clear hands-free conversationsRemovable battery recharges cell phonesPortable and wirelessBluetooth 2.1 for easy pairingTwo full range 50mm drivers for superior audioDetachable Li-polymer battery (2950mAh)Up to 7 hours of battery life3.5mm audio jackMute buttonVolume controlPlay/ pause buttonUNBTS200