A rugged ear cup design paired with rubberized pressure points amplifies low level noise, and an auxiliary cord compatible with MP3 players and smartphones completes the package. Features: – External audio jack connects to any music or audio source (input connection cord included) – Amplifies low level sounds more than 4 times – Directionally placed stereo microphones amplify low-level sound while blocking harmful impulsive noises over 82 decibels – Aggressive earcup design and rubberized pressure points for added durability – 4 hour shut off feature extends battery life – Single knob control for on/ off and vo. Actual product may differ slightly in color, size, or style. Please check the product description for more information. Howard Leight Impact Pro Electronic earmuff, Retail Pack R-01902. We love to hear from our customers. If you have any questions or concerns. We encourage interaction, feel free to leave product reviews and send us pictures of our items at work in the field. We offer a 100% Worry Free Guarantee! Please do not return any item in used condition. Please be sure to include the original order number and reason for the return. We like happy customers and will do whatever we can to make sure you are happy with your item and with our service. Thank you for your considering Buffalo Gap Outfitters for your outdoor needs! We value you as a customer hope to have the opportunity to serve you again in the future.