Custom Recreational Earphones for active individuals who love their music and want to upgrade from stock stereo earbuds. Perfect for air travel, exercise, or motor sports (not recommended for on-road use), the CR-1 is driven by a set of high quality drivers in a pair of full shell, clear custom fit earpieces. Compatible with virtually all personal audio devices including iPod, CD, DVD and MP3 players. The CR1 Earphone's may also be used to enhance your listening experience on your laptop and personal computer.