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. Premium electronic earmuff. Single microphone. On/Off volume control and indicator light. Adjustable headband. Compact folding feature for storage. NRR 26dB