Optimized for Microsoft Office Communicator 2007 and Microsoft Lync 2010 Make the evolution to PC communications simple with the new Calisto 240 USB handset. It's perfect if you're new to PC calling. The LCD display lets you see who's calling and an integrated full duplex speakerphone offers hands-free convenience. Functions like dialling, redialling, answering and muting calls are as simple as pressing a button. And with top of the line audio technology, you'll like how you sound too. When you're on-the-go, the Calisto 240 conveniently slips into a carrying pouch that's easy to tuck in your computer bag or carry on. Making calls from your PC is easy from the first call - wherever that may be.