Product information: 

Transmission range: 15 meters
Function: battery display, call function, voice control, music support, 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: birthdays, holidays, trade fairs, advertising promotions, employee benefits, anniversary celebrations, business gifts, opening ceremony, awards commemorative
Color: black, white