Bluetooth audio transmitter and receiver: Specification: Bluetooth Version 2.0 (Class II) Supported Profile: A2DP， AVRCP Distance: Within 10 meters Standby Time: Up to 140 Hours Battery: Built-in Rechargeable Lithium battery Power supply: 5V DC， 100~240V AC adapter Unit size 60 x 25 x 9mm Function: To add Bluetooth functions to your devices immediately Make your devices have bluetooth receiver funtion Turn your regular home stereo into a Bluetooth-enabled， wireless streaming machine. Bluetooth audio receiver adapter is suitable for travelers because its mini size Wireless adaptor connects directly to ipod series Support: MP4， MP3，HIFI， IPOD， Bluetooth Support Bluetooth audio and video remote control profile. Support paired Bluetooth stereo anheadphone and stereo headset to control lay\/pause forwards\/backwards. Package included: 1 x Bluetooth Dongle Receiver Adapter Unit size 60 x 25 x 9mm