Walkers XCEL 500BT Digital Bluetooth Electronic Muff with Auto Shutt Off (Black)The Walkers XCEL 500BT Black Digital Electronic Muff combines sophisticated sound processing, intuitive menu navigation, and rich electronic control features with an intelligent, forward thinking approach to design and ergonomics that delivers a hearing protection and enhancement system without precedent in shooting sports and hunting industries. Sound Activated Compression The XCEL 500BTs next generation Sound Activated Compression and variable