Transmission range: 10 meters
Function: battery display, call function, voice control
Custom processing: Yes
Print LOGO: Yes
Bluetooth protocol: 5.0
Channel: stereo
How to use: head-mounted
Whether single or dual ear: bilateral stereo
Applicable gift-giving occasions: weddings, birthdays, holidays, housewarming, trade fairs, advertising promotions, employee benefits, anniversary celebrations, business gifts, opening ceremonies, awards commemoratives, public relations planning