Item No. B21
Transmission range 10 meters
Function battery display, call function, voice control, support music
Bluetooth protocol 5.0
channel stereo
How to use head-mounted
Whether single or double ear bilateral stereo
Suitable for gift-giving occasions: weddings, birthdays, festivals, housewarming, trade fairs, advertising promotions, employee benefits, anniversary celebrations, business gifts, opening ceremonies, awards commemoration, public relations planning