1/8 INCH TO 1/8 INCH STEREO CABLE. IN=OUT TECHNOLOGY: LOW CAPACITANCE FOR PURE SIGNAL TRANSPARENCY. IN=OUT TECHNOLOGY: LOW CAPACITANCE FOR PURE SIGNAL TRANSPARENCY. TWO LAYERS OF SHIELDING PROVIDE NOISE REJECTION FOR QUIET OPERATION. A MUST HAVE ACCESSORY FOR PORTABLE MP3, IPOD, IPHONE, OR IPAD OWNERS. LIMITED LIFETIME GUARANTEE.