Slim low profile muffs. 22dB NRR. Make/receive calls and listen to music via Bluetooth connection. Features sound activated compression and omnidirectional microphone technology for maximum environmental sounds at a safe volume level. 5x amplification. Frequency tuned for natural sound clarity. Fast attack time of 0.01 second offers optimal noise blocking over 82dB while minimizing interruption of ambient hearing. Separate volume controls for sound enhancement and BlueTooth. Adjustable headband. Soft, comfortable ear cups and band for extended wear. Easy, replaceable ear cups with snap-in design. Compact, foldable design. Requires (2) AAA batteries (not included). Boxed.