Features: 1. Can be used to connect various electronic devices with bluetooth to enjoy wireless life, such as computer, laptop, audio, earphone, mouse, keyboard and so on. 2. In an environment without interference, a transmission distance of 20 meters can be achieved. 3. Wear-resistant and anti-oxidation material, higher quality. 4. Automatic memory device, after the first pairing, the subsequent computer will automatically connect when it is turned on.