Pyramex has been pioneering safety designs for over 25 years Pyramex has become on of the worlds leading manufactures of safety related products. With over 25 years of pioneering safety by delivering innovative and stylish products. This particular item is an individual pair of VGPME20 Sentinel Electronic Earmuff's which features a 26dB Noise Reduction Rating. Additionally this unit features slim profile ear cups, front facing microphone and runs on 2 AAA batteries (which are included). Pyramex VGPME20 (Black) Specifications and Features: Pyramex VGPME20 Sentinel Series Electronic Earmuff 26dB Noise Reduction Rating Slim Profile Ear Cups Fold Away Padded Headband Front Facing Microphones Automatic Shut-Off After Four Hours 3.5mm Aux Jack for use of MP3/Mobile Device Amplifies Hearing While Suppressing Harmful Sounds and Reducing to Safe Level 2 AAA batteries are included Black Finish