Specifications:Bluetooth V2.1 technology.Need not setup any software and very easy to use.Support profile: A2DP u0026 ARVCP.Support paired bluetooth-compatible stereo headsets/earphones to control play/pause,forward/backward.Support automatism paired (no button).Support paired pin code: 1234, 0000, 8888.Range of frequency: 2.42 to 2.480 GHz(SIM) spectrum.Support automatism standby mode: standby mode is started to save power when the stereo bluetooth-compatible headsets/earphones is not found in due time.Support for iPhone, for iPod mini, for iPod nano, for iPod video, etc.Compatible with 30-pin dock.Type: bluetooth-compatible TransmitterMaterial: ABSRange of Frequency: 2.42 to 2.480GHz( SIM) SpectrumWorking Current: 40mA(M