1. CNS-TS-V Model is a small volume and less weight communication equipment with high-performance headphones and microphone which is used in a dangerous environment. It can provide clear audio transmission under a very noisy environment. 2. CNS-TS-V Model makes your ears completely open, so that you could hear the tiny voice around you when you are communicating with others; it is different from the traditional headphone. 3. The voice information is collected by a high sensitive oscillationpick-up which is on the head, and sent to the skull's vocal cord, the vocal cord vibration transforms the voice information into sound signal. 4. CNS-TS-V Model will not affect other head protection equipments, like the helmet and respiratory mask, etc.. 5. CNS-TS-V Model is ideal communication equipment in specific tasks in the field of military, law enforcement, fire fighting, rescue, heavy industry and so on. It is easy to operate. Cardboard cartons.