RIO Gear Bluesonic Bluetooth Headset HCB38A - Wireless Bluetooth Headset with Changeable Faces (Silver, Navy and Red) Bluesonic Bluetooth Headset HCB38A - Wireless Bluetooth Headset with Changeable Faces (Silver, Navy and Red) Adjustable volume control by touching a single button. Supports voice dialing, three-way calling and call waiting by touching a single button (contact your cell phone provider for more information) The rechargeable built-in Li-polymer battery provides 9 hours of talk time and 300 hours of stand-by time. Includes USB charger cable and AC to USB inverter, user manual, and warranty. Compatible with most Bluetooth-capable cell phones