The FONE540 is a daisy-chainable USB speakerphone that enhances your audio conferencing experience in personal workspaces, huddle rooms, and medium-to-large conference rooms. Easy to plug in, install, and use, the FONE540 supplies business-class acoustics without creating extra work. The product supports USB connectivity and is listed with Bluetooth connectivity in some marketplace specifications. It features two omnidirectional microphones that provide 360° pickup, full-duplex echo cancellation, advanced noise suppression, and stereo audio output. Mounting is tabletop-style and the unit is designed for simple setup and reliable conference audio performance.