Our Bluetooth 5.0 aux adapter receiver. Designed for non-Bluetooth audio systems. For your various non-Bluetooth home audio systems or car speakers, this is the ideal solution to achieve ideal wireless audio. A device has two purposes, the dual mode is not only a receiver or a transmitter, making your life more intelligent.Very Easy to Use: Transmitter mode: 1.Insert the transmitter receiver into the USB port (if your device does not have a USB port. You can use a mobile phone charger or power bank, etc.). 2.Then use 3.5mm audio cable/RCA audio cable to connect the product to TV, PC or other devices. 3.Turn on your Bluetooth device. The transmitter will automatically search for your Bluetooth receiving device (such as Bluetooth headset, Bluetooth speaker, Bluetooth receiver, etc.). Receiver mode: 1.Plug the device into the USB port to supply power (such as car charging, wall charging, power bank, etc.), 2.The device light flashes blue quickly, connect the device with your non-Bluetooth audio device with a 3.5MM audio cable 3.Turn on the mobile phone Bluetooth, search for Bluetooth devices (wireless music adapter), click and connect 4.The pairing is successful and start to enjoy wireless music.Note: 1.Before connecting, make sure that your phone is not connected to other devices. 2.In transmitter mode, if the device is not paired with the desired audio device. Tap the function key. It will automatically search for and connect to the next device. 3.The receiver of the USB Bluetooth transmitter only transmits audio, not files. Only one Bluetooth device can be connected in transmitter mode.