①. Specifications: ②. Bluetooth V2.1 technology. ③. Need not setup any software and very easy to use. ④. Support profile: A2DP & ARVCP. ⑤. Support paired bluetooth-compatible stereo headsets/earphones to control play/pause, forward/backward. ⑥. Support automatism paired (no button). ⑦. Support paired pin code: 1234, 0000, 8888. ⑧. Range of frequency: 2.42 to 2.480 GHz(SIM) spectrum. ⑨. Support automatism standby mode: standby mode is started to save power when the stereo bluetooth-compatible headsets/earphones is not found in due time. ⑩. Support for iPhone, for iPod mini, for iPod nano, for iPod video, etc. ⑪. Compatible with 30-pin dock. ⑫. Type: bluetooth-compatible Transmitter ⑬. Material: ABS ⑭. Range of Frequency: 2.42 to 2.480GHz( SIM) Spectrum ⑮. Working Current: 40mA(Max) ⑯. Distance: 10 Meters ⑰. Size: 9cm x 6cm x 1cm/3.54inch; x 2.36inch; x 0.39inch; (Approx.) ⑱. Notes: ⑲. Due to the light and screen setting difference, the item's color may be slightly different from the pictures. ⑳. Please allow slight dimension difference due to different manual measurement. ㉑. Package Includes: ㉒. 1 x bluetooth-compatible Transmitter