Product information:

Transmission range: 10 meters
Function: battery display, call function, support for music, multi-point connection
Bluetooth protocol: 5.1
Channel: stereo
How to use: earplug type
Whether single or double ear: bilateral stereo
Color: A1: B16 round black, A2: M10 large screen black, A3: M10 small screen black, A4: S20 mirror, A5: M9-17 mirror, A6: M9-18 mirror, A7: M9 skull mirror, A8 :H3 black, A9:X3 black mirror

Packing list:

Wireless earphone x 1