(1)No plug into ear,sanitary.

(2)Super strong signal, working distance can reach 250 meters.

(3)High quality for sound.

(4)The channel of all the receivers can be adjusted together by transmitter.

(5)One click to turn off all receivers.

(6) One click to make all the receivers mute.

(7)Weights only 18g.

(8)Easy to charge by many choices.   

(9）Working time:about 10 hours.