The Outdoor Technology Wired Drop In is a headphone audio system, for use with any snow helmet with audio-ready slots, for you to use your audio device all day while on-hill. Allows for 10 hours of play time, and glove-friendly controls so you don't have to pull your gloves off ever. Comes with a carry pouch, and works up to -20 degrees. Rugged minimal design, and compatible with helmets from Bern, Giro, Smith, Anon, and more, please check your helmet is compatible before purchasing.