Description Super Stereo HD quality audio, Standard 3.5mm audio jack; Plug-and-play; No software required. This clean design is very simple to use and allows your audio devices to send or receive stereo audio via Bluetooth wireless. Features * Bluetooth Audio Adapter - 2-in-1 Receive / Transmit modes * Easy to switch between modes. * Super Stereo HD quality audio * 3.5mm plug standard to most audio devices. * Enables your audio devices to transfer stereo audio via Bluetooth. * Turns iPod and other amplifier / speaker systems into Bluetooth enabled audio devices. * Play music from Bluetooth A2DP enabled mobile phones and all other A2DP enabled audio devices. Specifications: * Bluetooth specification: Bluetooth V2.1+EDR * Bluetooth profile supported: A2DP and AVRCP * Operating distance: 10 meters Class? * Rechargeable 270 mAH LI-polymer battery * TX mode working time: 10 hours * RX mode working time: 9 hours * Standby time: Up to 400 hours * Charging time: About 2 hours