Jabra Bluetooth Headset - Black (BT8040) Active Noise Reduction, which enhances the sound quality on transmitted and received audio. E-SCO improves voice transfer from headset to phone. Equipped with A2DP for streaming music DSP (Digital signal processing) technology. Rechargeable battery, charge from AC power supply or PC with USB cable MultiPoint connects up to 8 devices - 2 at any one time. No-hook wearing style, includes 3 sizes of Jabra ear gels for a snug fit without an over-the-ear hook Bluetooth 2.0 supporting headset - up to a 33 foot range. Lightweight Less than 10 grams in weight Easy pairing and operation, pairs automatically with your Bluetooth-enabled device and includes answer/end call, voice dialing*, last number redial*, reject a call*, call hold/call wait*, mute and quiet mode functionality.