This USB Bluetooth music receiver is suitable for all speakers with U disk socket. As long as your speaker supports U disk playback function, audio can be output from the USB port; or the speaker has AUX port, which can be connected to the AUX port through the audio cable. After the Bluetooth pairing is successful, the music inside the mobile phone is played, and then the music is selected to be played by Bluetooth in the submenu, and the wonderful music is played out from the speaker! Features: Using the latest Bluetooth V4.0 technology, the data transmission rate is increased to 10Mbps, which is three times that of current Bluetooth technology, which ensures more stable wireless audio transmission, thus providing high-quality sound, shortening data transmission time and reducing Power loss. Compatible with all A2DP stereo Bluetooth devices including for iPad / iPhone4 / iPhone3G/3GS / and other for Apple products and Android on the market. All speaker solutions are supported. Bluetooth audio playback, answering phone functions. Button function: Previous song / Volume down, Next song / Volume plus, Play / Pause, Answer the call / hang up call function. Specification: Optional Color: Black, White Bluetooth specification: Bluetooth 4.0 + EDR Support A2DP V1.2 Output interface: USB+3.5mm audio port audio output Transmission rate: 3 (Mbps) Transmission distance: no less than 10 meters (no barrier) Power supply mode: USB power supply, 5V DC power supply Size: Approx. 5.5 * 2.1 * 1cm / 2.17 * 0.83 * 0.39in Weight: Approx. 26.2 g Package list: 1 * USB BT Receiver 1 * 3.5mm Audio Cable 1、Using the latest Bluetooth V4.0 technology, the data transmission rate is increased to 10Mbps, which is three times that of current Bluetooth technology, which ensures more stable wireless audio transmission, thus providing high-quality sound, shortening 2、Compatible with all A2DP stereo Bluetooth devices including for iPad / iPhone4 / iPhone3G/3GS / and other for Apple products and Android on the market. 3、All speaker solutions are supported. 4、Bluetooth audio playback, answering phone functions. 5、Button function: Previous song / Volume down, Next song / Volume plus, Play / Pause, Answer the call / hang up call function.