The BT is a Bluetooth wireless music receiver that connects to any stereo audio input. Now You can listen to music from your phone, laptop or without the hassle of cables. The BT 310 can connect to Home A/V systems, home stereos, headphones, automobile, or motorcycle speakers, 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 codes to enter if connect with Apple or Android devices. To complete, pairing some devices require a pass key or code, use "0000" LED lights beneath the button indicate device connection and charging status. The included stereo cables and adapter connect the BT 310 to any receiving device with a headphone jeck. The fully charged BT 310 provides Up to 8 hours of music reception or use continuous with USB power.