USB Type A host interface for reliable data transfer and enhanced performance Great for Audio/Visual Labs, Assisted Listening Systems and more that have a Mono jack for non-stereo use Wired/Wireless connectivity technology offers maximum listening convenience These supra-aural Voyager 4300 UC give you the comfort of portability Dance to your favorite tracks and never worry about the wires getting in your way with these wireless Bluetooth headset On-ear earpiece design ensures maximum comfort and pain, fatigue-free listening Boom microphone design ensures maximum convenience and optimal performance Stay connected smoothly with a wireless range of 298.6 ft Provides exceptional quality sound with greater immersion MEMS Technology microphone technology ensures maximum dependability and optimal performance