The Peltor PowerCom Plus II 2-Way communication headset is ideal for communicating in noisy environments. Unlike ear plugs or ear muffs, Peltor's headset not only limits external noises but also amplifies the conversations being transmitted through its radio. This headset has everything needed for its operation contained within the headset. The 2-way radio headset DOES NOT require a belt radio, wires, or base radio stations. The Peltor Headset also features a NRR of 25db and is compatible with existing in-plant UHF 2-way radio systems.