Plantronics P420 Calisto Portable USB Speaker Phone PROFESSIONAL AUDIO QUALITY: Enjoy crystal-clear PC audio with audio support up to 6800Hz. OFFICE SPEAKERPHONE: 360 degree room coverage is ideal for small to medium work spaces. NOISE CANCELING MICROPHONE: Eliminates distracting background noise for Skype and Internet phone calls to make your voice sound crisp and clear. EASE OF USE: Plug-and-play functionality requires no software or complicated software; just plug USB connector into device. PORTABLE DESIGN: Compact and portable design is perfect for in the office or on-the-road conferencing.