The 3M PELTOR Tactical Earplug helps protect your hearing, and can help improve situational awareness and communications in challenging environments. Wireless connectivity for monitoring radio or cell phone sound sources. Two-way communication through shoulder microphones and cell phone is maintained.The 3M PELTOR Tactical Earplug helps protect your hearing, and can help improve situational awareness and communications in challenging environments. Integrated with state of the art level dependent technology, the TEP 200 helps provide hearing protection in noise and situational awareness in quiet environments. Ear pieces also include a small antenna to allow audio signals to be received wirelessly from a neckloop accessory (not inc.).