Detailsbrand - EDIFIER/rambler;Article No - W820BTNB;Transmission range - 10m;function - Call function; voice control;Processing customization - no;Bluetooth protocol - 5.0;Vocal tract - stereo;How to use - Headworn;Single or double ears - Bilateral stereo;Suitable for gift giving occasions - Business Gifts;colour - White; gray; vitality orange; willow bud green; huguang blue;Mold Type - Common mode;chip type - Hengxuan;