one transmitter;one headset; one plug with two holes;two USB data lines;one pothook to easy charging;one  plastic holder for transmitter;two neck-slings;one instruction;one packing box

Transmitter:(1)size:42*15*80mm;(2)G.W.40g(3)voltage:DC3.7V 850mAh Reciever:(1)size:125*70*163mm;(2)G.W.50g(3)voltage:DC3.7V 260mAh

1.nonembedded design for ears protection under long hrs using 2.wireless and portable for convenient travel 3.low sound leakage reduce interference on others 4.collect the sound around to make yourself more safer outside 5.frequency adjustment button in accordance with ears' damage level 6.the function of slow-down voice speed to make sure the conversation going smoothly