The Plantronics Calisto 610 is a corded USB speakerphone for plug-and-play conferencing convenience. The Calisto 610 USB speakerphone turns any PC into a portable conferencing device. Manage calls - anywhere - with plug-and-play convenience. The compact speakerphone integrates with leading softphones to easily manage calls and set up small informal conferences. Single-touch controls include call answer/end, volume adjust, and mute. Compatibility with a Kensington style lock feature boosts security when deployed in small/medium work areas and shared conference rooms. With crisp wideband audio and full-duplex 360-degree microphone pick up, enjoy business- quality sound for everyone on the call.