P/N: M31-Mod4 The Earmor ™ Hearing Protection Earmuff protects against dangerous sound while allowing you to hear ambient sounds. Sounds are detected by two directional microphones and reproduced by the speakers inside the muffs. The M31 provides audible protection in noisy areas with impulsive noise, such as the shooting range or hunting. This Ear Pro Headset Can Be Scaled Up to Comms Capable Key benefits:1. Hearing enhancement 2. Hearing protection in noisy environments 3. Volume control allows for adjustable hearing enhancement  Modernized Mod 3 version includes:- New threads for easy unscrewing- 3 second button delay to prevent accidental turn off- Silicon slings for caps of battery compartment- Improved metal battery cover- Dynamic voice tracking- Increased RF immunity- Improved headphone case materials NRR (ANSI): 22 dbPower supply: 2 x AAAEstimated battery life: ~ 350 hCompliant with CE / RoSH / ANSI S3.19-1974Waterproof: IPX-5Color: Black, Olive Drab Green, Coyote Brown. Ask us about our other color options here. Weight: 350 g *Testing performed by Earmor Find Our Mic Kits For Hearing Protection Headsets (Ear Pros) Options Here.  Look For Public Safety/ Military Grade Headsets? Find Our Tactical Headsets Here Shipping ETA: Limited Quantities Available, New Inventory Expected In 7-10 Days. 30 Day Fit & Function Money Back Guarantee. Purchase with Confidence. 12 Month Free Replacement Warranty  We have the best/easiest exchange & return process. Purchase with confidence. If you have any questions we are standing by to help.