Bundle includes by Honeywell Impact Pro Sound Amplification Electronic Earmuff (R-01902) and Genesis Sharp-Shooter Safety Eyewear, Clear Lens (R-03570) Built-in directional microphones amplify range commands and other ambient sounds to a safe 82 dB, providing more natural listening and enhanced communication Actively listens and automatically shuts off amplification when ambient sound reaches 82 dB; passively blocks out noise at 30dB Includes 2 AAA batteries and a 3.5mm connection cord for MP3 players and scanners; automatic shut-off feature after 4 hours increases battery life 9-base wraparound uni-lens style offers maximum protective coverage and superior peripheral vision; soft, elastomer browguard diffuses impact while providing comfort at all key points.