Product information: 

Transmission range: 10 meters
Function: battery display, call function, NFC function, voice control, support music, multi-point connection
Bluetooth protocol: 5.0
Channel: stereo
How to use: earplug type
Whether single or double 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
Color: black, white, sapphire blue, bright red, low temperature discoloration white (peach red discoloration)