The Logitech BSP420 USB Speakerphone has an advanced DSP (digital signaling processor) chip and a high-fidelity speaker that creates a 'best in class' calling experience. The full-duplex operation insures those natural sounding conversations. The wideband audio along with the 360* Omni-directional microphone offers the user the ability to use this stylish speakerphone in various business settings. With its compact design and integrated USB cord the BSP420 is the perfect user friendly video conference companion. It even comes with its own travel case for portability. For the times you need a private conversation the 3.5mm analog jack can be used with a headset. The touch sensitive controls and LED lights on the device provide simple mute and volume adjustments plus answer/hang up.