Bluetooth adapter allows to stream audio wirelessly by turning your old stereo, wired headphones, TV, or other wired devices into Blu etooth-enabled receivers or transmitters. If the TT-BA09 can not pair with your Bluetooth headphones/speaker, we advise you to reset the TT-BA09 in the TX mode. Please switch the mode (switch to RX, then switch back to TX ) after it is turned off for 5 seconds and reset your headphones or speakers, then restart. If the TT-BA09 can not pair with your phones or tablets, we advise you to reset the TT-BA09 in the RX mode. Please switch the mode (switch to TX, then switch back to RX ) after it is turned off for 5 seconds, then restart: 1. Press and hold the Power Button for 5 seconds (LED flashes blue slowly) and tap twice to enter pairing mode (LED flashes red and blue alternately). 2. Activate the Bluetooth function on your phone and search for the nearby Bluetooth devices: For iOS: Settings > Bluetooth:On > Scan for devices For Android: Settings > Wireless & Networks > Bluetooth: On > Scan for devices 3. Find "TaoTronics TT-BA09" in the search results and tap on it to connect. Once connected, the LED indicator will turn solid blue. 4. Connect to the headphones jack of your non-Bluetooth devices such as the wired headphones/speaker, you will hear sound out from the stereo. If the adapter can't be turned off, please kindly press and hold the MFB of the Transmitter, and at the same time plug the Transmitter into an outlet to get charged for 5 seconds. Please note the power has to be inserted at the same time the button is held down.