Features:
The built-in orienteering microphone can amplify the range instructions and other ambient sounds to a secure 82 dB, providing more natural listening and enhanced communications.
Active monitoring and auto-close amplification when the ambient sound reaches 82 dB.
With noise reduction level (NRR) of 22dB.
Can be used for the cleaning of the gunstock.
Adjustable headband to ensure safety.
Compact folding design is convenient for storage.
Integrated power/ volume knob-Includes AUX input and 3.5 mm connecting cable for MP3 player and scanner.
With auto power off function (when no operation after 4 hours) to extend battery life.
Long battery capacity to play for about 350 hours.

Specifications:
Type: Noise-proof Earmuff
Style: earmuffs
Material: ABS plastic
Energy-source: Battery powered
Sound level: 24 dB
Measurement System: English/ Standard
Special function noise reduction level (NRR): 22 dB
Whether include battery: NO
Average battery life: about 350 hours
Color: Black, Army green (optional)
Size: about 23x9cm / 9.06x3.54in
Product size: about 11 * 10 * 4CM(Single earplug)
Battery type: 2* AAA batteries (NOT Included)
Features: Headset, noise reduction, hearing protection, foldable, portable, long standby, durable, outdoor equipment
     
Package list:
1 * Noise-cancelling headphones

Notes:
1. Please note that it requires 2* AAA batteries, which are NOT included.
2. Please allow slight error due to manual measurement. Thanks for your kind understanding.