3M 7010336978 Electronic Earmuffs 21 Db Nrr Gray

Product Description

The 3M 7010336978 is an electronic hearing protector designed for shooting sports, hunting, and other high-noise environments where situational awareness matters. The earmuff suppresses impulse noise from gunshots while simultaneously amplifying ambient voices and environmental sounds for clear communication. With a 21 dB Noise Reduction Rating, it provides meaningful protection against hazardous noise levels above 85 dB. A 3.5mm audio input jack allows connection to MP3 players or two-way radios. Runs on 2 AAA batteries with a 4-hour auto shut-off to conserve power. Installed and used by range safety officers, hunters, and competitive shooters.

This earmuff is built for range and field use. The low-profile cup design accommodates cheek welds on rifles and shotguns without breaking a shooting stance. Recessed microphones are durable enough for repeated field use. The re-engineered headband provides an improved fit across a wide range of head sizes. The 4-hour auto shut-off and easy-access battery door with tether make it practical for extended range sessions or all-day hunting applications where convenience and reliability matter.

Key Features

• 21 dB Noise Reduction Rating (NRR) suppresses hazardous impulse noise from gunfire
• Electronic amplification of ambient sound and voices while blocking harmful noise
• Low-profile cup design clears rifle and shotgun stocks for proper cheek weld
• 3.5mm audio input jack for compatibility with MP3 players and two-way radios
• 4-hour auto shut-off preserves battery life during extended use
• Easy-access battery door with tether; powered by 2 AAA batteries
• Durable recessed microphones suited for range and field environments

Compatibility

Designed for use in shooting range, hunting, and loud sporting event environments where a 21 dB NRR electronic earmuff is appropriate hearing protection.

Installation Notes

No installation is required. Insert 2 AAA batteries into the battery compartment before first use. Ensure the earmuff forms a proper seal around the ear for rated noise reduction performance. Users should evaluate the adequacy of hearing protection for their specific noise exposure conditions, as NRR values are established under laboratory conditions.

Technical Specifications

• Noise Reduction Rating (NRR): 21 dB
• Audio Input: 3.5mm jack
• Battery: 2 AAA
• Auto Shut-Off: 4 hours
• Color: Gray
• Length: 5.51 inches
• Width: 4.53 inches
• Height: 9.65 inches
• Weight: 1.149 pounds
• UPC: 051141990606

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7010336978