White Drop In Universal Audio Speakers for Snow Helmets Fits Giro Smith K2 Salomon Atomic Anon Bern Bolle Head Pret Marker Sandbox or Shred Optics Fits any snow helmet that accepts aftermarket audio. These have been tested in Giro, Smith, K2, Salomon, Atomic, Anon, Bolle, Head, Pret, Marker, Sandbox, or Shred Optics. Will work with Bern Helmets with Audio capable liners as well. If you are looking for simple drop in speakers for your snow helmet at a fair price, look no further 46 long cord with 3.5mm jack will allow you to store your audio device where ever you need. To operate, simply drop the speakers in your helmets audio capable ear pads, route the cord to your audio device (Phone, iPod, Universal Bluetooth Adapter) plug in your audio device and press play from your device. 40mm drivers will give you great highs, mids and some base to send you down the mountain enjoying your favorite playlist