Color: T10- khaki (touch), T10- black (touch), T10- white (touch), C021- black (touch digital display), A16C- black (digital display touch), W1 black (keystroke), C021 white (touch digital display), Air 2S- black (digital display touch), white (digital display touch)
Bluetooth Protocol :5.0
Transmission range :10 m
Channel: Stereo
Can LOGO： Be printed
Single binaural: Bilateral stereo
Functions: Power display, call function, support music, multi-point connection
Usage: Earplug