Sony DRBT10CX Stereo Bluetooth Earbud Headset - Retail Packaging - Black Earbud Headphones Receiver With Built-In Microphone Useful Rechargeable Function 9mm Neodymium Driver Units Deliver Powerful Sound Talk/music Play Time Is Approximately 11 Hours Wireless Bluetooth headset with pair of earbuds and built-in microphone Clip-on wireless transmitter lets you talk on your cell phone without cables 9 mm neodymium drivers built into earbuds deliver powerful sound Offers up to 11 hours of wireless talk time and 100 hours of standby time Works with Bluetooth-enabled A2DP devices; 1-year parts warranty