Konftel is one of our favorite USB, VoIP, and Analog audio conferencing systems available today. The Konftel 55W is a absolutely awesome bluetooth wireless chatpod. It's a great option for a conference room microphone where you don't have to run any wires. The Konftel 300 series is full of great audio conferencing USB microphones. Konftel USB Conference Phone Product Line includes Bluetooth, SIP, IP, Analog, POTS and more standards. Check out this Konftel Conference Phone Product Line review konftel 300, Konftel 300IP, Konftel 300M, Konftel 300Wx, Konftel 250, Konftel 55, and the Konftel 55W.