EARMOR M30, The M30 is designed to make benefits of electronic hearing protection accessible to everyone. The simple and reliable noise cancelling mechanism helps everyone saving ears in noisy environment, especially protect your hearing from the damaging sound of gun blasts, while helping you hear clearly to optimize communication, success and safety on the range. The M30 comes with an 3.5mm AUX audio input for media devices, suppresses harmful noise above 82 dB, is IPX-5 water resistant, features an 4 hour auto shut-off mechanism and runs on 2x AAA batteries.