Shure EAADPT-KIT Adapter Kit (Combines 1/4" Adapter, Airline Adapter, Attachable Volume Control) Female adapter connects 1/8-Inch (3.5 mm ) inputs to 1/4-Inch outputs of home stereo and professional audio equipment. Dual-prong adapter connects to in-flight entertainment systems on most international flights. Accepts standard 1/8-Inch stereo pin. Level attenuator offers precise volume adjustment and comfortable listening to playback devices, including airplane headphone outputs that are often too loud at the lowest volume setting. Reduces the level of incoming signals and background hiss. Includes 1/4-Inch Adapter, International Airline Adapter, and Attachable Volume Control. Compatible with all Shure earphones.