Tele-coil support- hearing aid focused-works with all standard tele-coil-equipped hearing aids and brings all the benefits such as improved communication, superb sound and productivity to users Natural listening experience with sennheiser voice clarity Perfect speech output- ultra noise cancelling microphone Outstanding sound quality- high-quality neodymium speaker East to store and bring along- with fold-flat ear cups and carry Pouch Connectivity technology: Wired