Product Name:Electronic Ear Defenders Hunting Earmuffs Industrial Noise Cancelling Winter Safety Ear Muffs Gun Range Hearing Ear Protection Material: ABS + PVC Dimensions / Size:folded 12 x 13 x 10 cm Weight:340 g Unit Packaging:Color box ● Built-in omni-directional microphones ● Noise reduction rating (NRR): 25 db ● Auto to compress off all the noise when ambient sound reaches 82 dB ● Sound Amplification 7 Times ● Includes AUX input and 3.5 mm connection cord for MP3 players and scanners ● Integrated power/volume knob ● Operates on 2 'AAA' batteries (Not included) ● Made of the highest quality microchip to keep nice sound quality ● Low profile earcups cups with rubberized coating for firearm stock clearance ● High quality soft PU leather padded steel headband design for all day comfort ● Convenient for daily life,folds into compact size for pocket storage