1Allows the computer to have Bluetooth function, realize wireless transmission and sharing. 2Support for WINDOWS ALL/OS X/LINUX system, support for iphone earbuds of 3rd generation. 3Achieve higher sensitivity, faster transmission speed, and more stable device connection. 4Small, lightweight and portable, convenient for carry and storage, high performance. 5After the device is successfully matched for the first time, it will automatically connect after the subsequent startup. Item Type: USB Bluetooth Adapter Material: ABS Color: As Picture Shown Weight: Approx. 12.0g/0.4oz Bluetooth Version: Bluetooth 5.0 Bluetooth Chip: for BR8041 Transmission Distance: About 10m Scope of Application: Support for WINDOWS ALL/OS X/LINUX system, support for iphone earbuds of 3rd generation. Function: Computer Bluetooth Expansion How to use: 1. Confirm whether the transmitter you purchased is the call version 2. Insert the transmitter into the USB port of the computer, the red and blue lights flash alternately 3. Turn on the pairing status of the Bluetooth headset/speaker 4. Wait for the transmitter to automatically pair with the Bluetooth headset and speakers (the computer does not require any operation) 5. After the pairing is completed, the red light of the transmitter is always on 6. Some computers need to set the sound output channel, or plug it in again 1 x USB Bluetooth Adapter 1 x Manual