Dynamic earphones are a must for true-to-life audio experiences and Custom-2 makes it a reality. Delivering crisp highs, deep lows, and everything in-between. Works with iPods, iPhone & other portable devices Exclusive KG534 dual-balanced armatures Contour ear gels accurately fit inside your ear canal for amazing comfort & excellent noise isolation Earphone nozzles prevent tips from becoming lodged in your ear Flexible ear wire system mold precisely around ear for a perfect external fit Adaptable ear wires let you experience full or partial noise isolation?a great safety feature for on-the-go users Reliable strain relief at every cable connection point to avoid wire damage Cloth cable with wire guard - cloth weaves over PVC jacketed signal cables prevent cables from becoming exposed 50 Cable Nominal impedance - 16 ohms Drive components - full range KG 534 dual-balanced armatures Input connections - 3.5mm In the box - Five sets of different-sized tinted ear gels Medium carrying case that fits 80G iPod Ear gel cleaning tool Airplane adaptor