Maxell Hp21 Headphone and Cell Adapter Kit (190398) Kit Includes: Iphone Adapter 3.5Mm-2.5Mm Cell Phone Adapter Dual Pin Airline Adapter Kit includes five different adapters and a 20-foot extension cable, allowing you to use standard headphones with a wide variety of mobile phones Includes iPhone adapter, as well as a cell phone/PDA adapter for headphones or earpieces Includes dual-prong airline adapter Included dual headphone adapter connects two sets of headphones Also includes 1/4-inch stereo adapter