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 answerend volume adjust and mute compatibility with a kensington style lock feature boosts