Hearing protection. Sound enhancement. Bluetooth Connection. Sounds like a win-win-win. The EarShield Ranger Electronic Earmuff with Bluetooth offers up this triple combo in a sleek, compact earmuff. Slim low profile muffs, 22dB NRR, make/receive calls & listen to music via Bluetooth connection, features sound activated compression & 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 & band for extended wear, easy, replaceable ear cups with snap-in design, compact, foldable design, powered by 2AAA batteries (not included), aux jack and cord included.