The super sensitive stereo microphones are strategically located for incredible 360-degree situation awareness. Gel Ear Seals with a proprietary design provide extra comfort and extended wear ability in hot and cold climates. The slim, low profile cups have a leather cut-out to protect stocks and ensure a quiet shoulder mount. Featuring DLSC, military grade circuit boards, 8-Bit Micro-Processors, and single roller power controls, the Silver 22 muffs are built for performance and ease of use. A lightning fast 1. 5ms response time, an industry-leading 3-year and the reliability of USA made quality make the Silver 22 a perfect choice for your hearing protection needs. Uses 2 AA batteries (not included). Pro Ears Silver 22 PESILVER – Gray, One Size.