... Handsfree) modeMain function: answer the call, end the call, refused to call, redialing , sound volume, call waiting , voice dialingPerfect bluetooth ... Best quality and quick deliveryAbout us:We are Professional supplier of cellphone accessories, such as protective case, battery, charger ... availableSuper fast deliveryDetailed pictures: bluetooth headset(5-Hour Talk Time/150-Hour Standby for iphone4s