Provides hearing protection and noise reduction up to NRR 25dB. Two-way radio with 22 channels and 38 private sub-channels at 460 MHz with a two-mile range. Headset features a noise-canceling boom microphone, voice activation and cup-mounted push-to-talk. The wide, soft-padded headband and cups are comfortable for all-day use. Provides auxiliary input for cell phone or communications radio. Runs on two AA batteries or Ni-MH battery pack (not included). Power Source(s): AA Batteries; NiMH Battery; Number of Channels: 22; Color(s): Black/Navy; Power: N/A.