Binaural Stereo Call Earbud Wireless Headset $ 10.67 Product information: Transmission range: 10 meters Function: battery display, call function, support music Bluetooth protocol: 5.0 Channel: stereo How to use: earplug type Single or dual ear: bilateral stereo Applicable gift-giving occasions: trade fairs, employee benefits, anniversary celebrations, opening ceremonies, awards commemorative Color: black, white