72 gas mask special bone conduction headset is special designed for gas mask.
72 gas mask special bone conduction headset is special designed for gas mask,it can easily use with majority mask.
Put the microphone in the head and set theloudspeaker in the side of mask, the voice will be extracted through the skullvibration and let you easily to listen the voice.
This product can be compatible with all Huari PTT.