The On-Site Safety M71 Road Runner (Level Dependent) Ear Muffs unique electronic system amplifies all noises up to 85dB, so you need not remove your ear muffs to hear the important noises normally blocked out by most ear muffs. Modify the amplification of the ambient noise with the control dial.

Features include;
•Lightweight - only 349gm
•Clamping force 11.9 newtons ensuring comfortable hearing protection
•The M71 Road Runner ear muff is engineered to attenuate noise at and above 85dB
•The M71 Road Runner ear muff is able to be used as a normal ear muff when the control switch is not turned on
•Operates with 2 x AA batteries
•21dB SLC80 Rating (Class 3)
•Complies with Australian Standard AS/NZS 1270
•Rotary volume dial
•The M71 Road Runner ear muff comes with a padded head band for extra comfort
•Collapses into a small size for easy carrying