Transmission range: 15m+ 
 Function: Call function, support music 
 Bluetooth protocol: 5.0 
 Channel: Stereo 
 How to use : In-ear 
 Whether single or double ears: bilateral stereo 
 Applicable gifts occasions: opening ceremony, employee benefits, anniversary celebrations, awards commemoration, trade fairs, advertising promotions, festivals, weddings, housewarming, public relations planning, birthdays, business gifts