2 in 1 transmitter and receiver Two modes are available: transmitter and receiver functions to achieve wireless stereo music streaming. Bluetooth 5.0 + EDR This Bluetooth adapter features an updated version of V5.0 + EDR technology that delivers high-speed wireless signals and connects remotely to the device up to 33 feet (10 m) indoors can. Easy adjustment and good anti-interference performance. Wide Compatibility Support cars, computers, TVs, projectors, cell phones, tablets, MP3 players, CD players, etc. You can enjoy wireless music with low latency in your home or car. USB power adapter The Bluetooth adapter uses a 3.5mm audio cable that connects the device to the USB power adapter. Note: To avoid audio interference, do not plug the devices USB port directly into the socket, but use the charging head for power supply. You can also use a power bank to avoid noise. Packing list and quality assurance 1 x USB Bluetooth adapter, 1 x 3.5 mm audio cable Product After the installation is complete, why does the device turn on, the device does not start and the indicator light does not respond 1. Please check that the device is fully plugged into the USB power supply connector. 2. Please check that the USB power supply is working properly and that there is a 5V output. 3.If the installation is correct and the usb power adapter is normal, check if the bluetooth adapter is loose. Product parameters -Bluetooth version: V5.0 + EDR -Working frequency: 2.402-2.480 GHz -Working area: 33 feet 10M -Bluetooth V5.0: Supports A2DP, AVRCP -Power supply: USB DC5V -Audio input / output interface: 3.5mm audio interface -Two modes: transmitter mode and receiver mode -Weight: 82g-Size: 60mm * 27mm * 9mm Packaging accessories: * 1 x USB Bluetooth 5.0 adapter * 1 x 3.5 MM audio cable Note: If you connect the USB cable of the USB Bluetooth adapter and the audio output device to the socket at the same time, this can cause interference. You need to use the charging head for power supply. You can also use the power bank to avoid noise. This device is only suitable for audio transmission and does not have a data transmission function.