Howard Leight Impact Sport Bluetooth Earmuff Nrr21 Odgrn. This Protective Ear Muff from the experts at Howard Leight is Bluetooth compatible and provides a noise reduction rating of 21db for increased hearing protection. The Howard Leight Impact Bluetooth Earmuff Nrr21 Odgrn features a pivoting ear cup and pivoting padded headband provides a secure and comfortable fit for long term wear. This Howard Leight Hunting Headset has an extremely durable injection molded headband that is guaranteed to be comfortable through all your hunting trips. For a great way to make sure your hearing is protected choose the Howard Leight Impact Bluetooth Sport Ear Muffs. Specifications for Howard Leight Impact Sport Bluetooth Earmuff Nrr21 Odgrn: Manufacturer: Howard Leight Color: Hunter Green/Black NRR: 21 dB Package Contents: Howard Leight Impact Sport Bluetooth Earmuff Nrr21 Odgrn