The Radians CSE20BX Tactical Electronic Earmuff is a premium electronic earmuff which amplifes low level sounds while protecting against harmful noise. Excellent hearing protection for all hunters and shooters. Adjustable headbad for all day comfort. Compact folding feature allows for easy storage. Product Features Electronic compression Amplifies environmental sounds Single microphone Compact folding feature Adjustable headband On/Off Volume control and indicator light NRR 26 dB