1.NRR: 22dB 2.Slim shells 3.Input jacket 4.Wear comfortable 5.Foldable design, easily to stock. 1. Protect your hearing from harmful noises, but also allow you to hear normal conversation. 2. Weak sounds can even be amplisfied, so you hear them better than you would without electronic ear muffs.3. Immediately attenuated the noises above 82 dB. 4. On/Off switch with volume control on both cups. 5. ...
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