Otis Technology EarShield Ranger Bluetooth Earmuffs 22dB Black 22dB NRR. A successful hearing protection device is a great tool to have on the job site or shooting range. With the Otis Technology EarShield Ranger Bluetooth Earmuffs buying a high quality ear muff has not been easier. In an effort to be sure you have some of the most effective gear on the market these Protective Ear Muffs from Otis Technology were created utilizing exceptionally high quality materials and construction. For a number of years Otis Technology has been generating top of the range hearing safety and the Otis Technology EarShield Ranger Bluetooth Earmuffs is the response of their dedication to making certain that you're using the very best items that the ear muff industry is providing. If you're looking for the ultimate way to ensure that your ear drums are guarded from damage select the Otis Technology EarShield Ranger Bluetooth Earmuffs. Specifications for Otis Technology EarShield Ranger Bluetooth Earmuffs: Manufacturer: Otis Technology Color: Black NRR: 22 dB Quantity: 1 Battery Type: AAA Package Contents: Otis Technology EarShield Ranger Bluetooth Earmuffs Otis Technology FG-ES22B-BK: EarShield Ranger Bluetooth Earmuffs 22dB Black 22dB NRR