BT-163 USB Bluetooth Music Receiver 3.5mm Adaptor Dongle Speakers Car Mp3 By Shopizone - WhiteProduct Specification :1) Bluetooth: 2.1 + EDR.2) Support : A2DP V1.2.3) Powered By 5V DC.4) Transmission Rate : 3 (Mbps).5)Transmission Distance : ≥10m.6)Power Supply Mode : USB-Power.Operation Steps :Step One :i) For No USB port Speakers - Supply power to the device by connecting charger with 5V USB interface, then connect the speaker's AUX port with the audio cable.ii)For Speakers with USB port- Connect the device with speaker'r USB port directly, then connect the Speaker's AUX port with the audio Cable.Step Two :i) Turn on the Bluetooth function of computer. mobile or other device which has Bluetooth function, searching for the BT-163 device to connect and input : 0000 for matching when the device is in the matching mode. After matching success,the indicator light turn to twinkle slowly. Then you can use your Iphones Ipad playing the music.