Switch from music to calls with the press of a button; Integrated touch sensitive controls; Compatible with bluetooth stereo adapters PC850 & D200 PC adapter; DC800 for the home stereo; Behind-the-head wearing style helps provide a comfortable and stable fit water and sweat resistant; Enjoy up to approximately 6 hours music listening, 7 hours talk or 6 days standby time from a single charge; 180mAh lithium-ion rechargeable battery; Version 2.0 Bluetooth wireless technology for better call quality, less interference and faster connections; Class 2 Bluetooth wireless technology range up to 10m (33ft); Mini USB connector for charging; 1.14oz; 126mmx130mmx48m; Package Contents: S9 headset, AC charger, quick start guide.