Wireless connectivity for monitoring radio or cell phone sound sources. Ear pieces include a small antenna to allow audio signals to be received wirelessly from a neckloop accessory (accessory sold separately). Two-way communication through shoulder microphones and cell phone is maintained. 3M PELTOR Tactical Earplug is compatible with several types of headborne 3M Personal Protective Equipment (PPE) such as helmets, hard hats, and face shields. Noise Reduction Rating (NRR) tested in accordance with ANSI S3.19-1974. Kit includes portable charging case, 1 pair 3M PELTOR UltraFit Eartips Small, 1 pair 3M PELTOR UltraFit Eartips Medium, 1 pair 3M PELTOR UltraFit Eartips Large, 1 pair 3M PELTOR Triple C Eartips, 15 pairs wind screen foam, 3 AA batteries, retention cord, and user instructions.