Electronic Hearing Protection Earmuffs with Sound Amplification and Suppression Ultra-low profile design Audio input jack for external devices Low noise and frequency adjustment for natural sound clarity Volume control for personalized listening Sound buffer composite shell for durability Single switch controls pickups on both sides Powered by two AAA batteries (batteries not included) Operating time exceeds 200 hours Provides up to 6x sound pickup amplification 3.5mm dual-channel audio interface compatible with mobile phones and other audio devices Net weight: 360g Product gross weight with packaging: 485g Packaging: Neutral carton Expanded dimensions: 14 x 12 x 23 cm Collapsed dimensions: 12 x 10 x 13 cm Available colors: Black, Khaki, Green Includes: 1 x Electronic protective earmuff