The BT 310 is a Bluetooth wireless music receiver that connects to any stereo audio input. Now you can listen to music from your phone, laptop or iPad without the hastle of cable. The BT 310 can connect to home A/V system, home stereos, headphones, automobile or motorcycle speaker, Boats, Rvs and more Touch and hold one button to power on the BT 310 and it will automatically search for a compatible transmitter, No any code to enter if connect with Apple, Windows or Android device. To pairing some device require a pass key or cod, use “0000” LED lights beneath the button in device connection and charging status The included stereo cable and adapter connect the BT 310 to any receiving device with a headphone jack. The fully charged BT 310 provides up to 8 hours of music reception or use continuous with USB power.