Bluesonic HS879 Bluetooth Stereo Headset--Party time Embedded microphone to both make and receive calls via Bluetooth or VoIP device Bluetooth 2.0, Requires phone with Bluetooth stereo (A2DP) and AVRCP (Audio Advance Distribution Profile) The rechargeable built-in Li-polymer battery provides 8 hours of talk time and 100 hours of stand-by time Compatible with most Bluetooth capable cell phones; supports internet phone call Include AC Adapter; item can be shipped only within the U.S.