Yamaha PJP-25UR Mobile/Office USB Audio Conference Microphone and Speaker For home, office, or on-the-go Movable mic-arms allow optimization of sound pick-up ranges Compact, portable and lghtweight design. Portable PC based "Speakerphone Style" communications Built In echo canceller for full duplex and exceptional noise reduction Portable PC based "Speakerphone Style" communications Compact, portable and lghtweight design. Built In echo canceller for full duplex and exceptional noise reduction Movable mic-arms allow optimization of sound pick-up ranges For home, office, or on-the-go