Jabra Evolve 30 II MS Stereo Corded Headset – 3.5mm, USB-AJabra Engage 50 II MS Stereo Headset USB A A professional on ear wired headset designed for superior communication and call clarity. Specifications: Product Type Wired USB A Headset Recommended Use Computer Communication Headphones Form Factor On ear Connectivity Wired Sound Output Mode Stereo Audio Specs Frequency Response 50 20000 Hz, Max Input Power 30 mW Microphone Boom, with 3 included microphones Controls Mute, Volume Control, Answer End,