The Walker's Razor Walkie Talkie is a great add on to your Walker's Razor Muffs. The Razor Walkie Talkie is the way to add hands-free communication to your favorite Razor Muffs. With 12 hr of battery life you will be able to enjoy features like push to talk, voice activated transmission, communication up to 3 miles, and private and priority channels. Enjoy the ability to protect your hearing while still being able to communicate with others. Fits: All Walker's Razor Muffs equipped with an audio input jack.