The new concept of bluetooth headset GBH-M100 shows different features from the conventional mobile headsets. It does not need to be charged frequently. The stand-by time goes up to 60 days. The Auto Key Lock™ prevents an unwilling call. The buttons locks automatically when the headset is unfolded. When there is an incoming call, just fold the headset to receive a call, it connects the call automatically by Smart Connection™ technology. The stylish and easy-to-carry design can be worn as a hand-strap or necklace. It needs to be charged by mini USB charger or AC / DC travel charger.