Stratos 5FNKMFSG-CRM-ST Fleece Neck Muffs, Cream Built in high fidelity stereo headphones with detachable cord. Compatible with all MP3-players, iPod's, and most audio devices. Adjustable click to fit frame fits different head sizes. No Power Required. Speakers Rates:0.5wx2 Easily connects to most audio devices with the AUX cable Keep you linked to your music, providing you with high quality sound while keeping you warm in the harsh cold weather