1. Using Bluetooth 5.0 technology, the connection is simpler and faster, the sound quality is clear and anti-interference. 2. On-line chat via Bluetooth wireless transmitter. 3. Headset headset design, more convenient to use, better call effect. 4. Bluetooth version 5.0 supports simultaneous connection of two devices, and the Bluetooth link distance is within 10 meters. 5. Headphones use noise-reducing microphones to better enhance sound and suppress background noise. Whether you work in your home office, call center or drive on the highway, you can experience crystal clear hands-free calling. Headphones are light and comfortable, and the adjustable headband can be adjusted according to the head shape of consumers, and then find a comfortable way to wear them. 6. Product name: Bluetooth telephone headset. 7. Adopt 4 times anti-noise technology. 8. Supports Headset Profile and Handfree Profile. 9. It has the functions of redialing the last call number, refusing to answer, and adjusting the volume. 10. Colour:Black. 11. Material:ABS. 12. Package Contents: 1 * Telephone Headset 1 * Data Cable Only the above package content, other products are not included. 13. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.