The BT Drive Free 112 is handy as a conference or office device and can also be used in the car. Thanks to an improved microphone system and D.S.P. technology for echo and noise reduction, this device provides for outstanding voice quality. Features: Excellent sound quality for D.S.P. solution for echo cancellation and noise suppression Multi pairing, support to connect two cell phones General features: pick up call, end a call and reject a call Muting, volume adjustment. Technical details: Weight: 60 g Size: 116 x 45 x 15 mm (L x W x H) Bluetooth® specs: V2.1 + EDR (Enhanced Data Rates) Frequency range: 2.4 GHz spectrum Battery: 3.7V Rechargeable Li-Ion (replaceable) Call time: Up to 15 hours Standby time: Up to 500 hours Charging time: Approx. 3 hours Range: Up to 10 meters Key functions: Pairing Call accept Call end Call deny Redial Microphone mute Call forwarding