The Walker'sA(R) Mounted Walkie Talkie fits directly over your Razor Ear Muffs, giving you an instant platform for clear communication. Walkie Talkie features 22 different channels, voice activation, plus a 2-3 mile range. Razor Ear Muffs sold separately. Designed to fit on your Walker's Razor Ear Muffs 2-3 mile range 22 channels Push-to-talk and voice activated Runs on (2) AAA batteries (included)