Transmission range: 10 meters
Function: battery display, call function, support for music, multi-point connection
Bluetooth protocol: 5.0
Channel: stereo
How to use: head-mounted
Whether single or double ear: bilateral stereo
Applicable gift-giving occasions: opening ceremony, employee benefits, anniversary celebrations, awards commemorations, trade fairs, advertising s, festivals, weddings, housewarming, public relations planning, birthdays, business gifts
Color: red, black, blue