HI-FI Sound, 30mm Mic capsule, Mute button , Plug and play USB connectivity, Adjustable Microphone Boom HS-391 is a USB computer headset with a microphone. Achieves voice input and sound playback by the USB port to a computer. Headset is plug and play, no driver required. Using two 30mm speaker playback units, it offers crystal clear sound quality. The adjustable microphone boom makes it easy to pick up the human voices in all direction. The headband is wrapped in soft and comfortable material. The multifunctional wire control can mute the microphone and adjust the volume conveniently.