CALISTO 57250-001 P240-M USB Calisto P240-M USB Handset (Optimized for Microsoft) UC Standard version built for UC applications and softphones from Avaya, Cisco, Microsoft and more. Download the latest release of Plantronics software and get one-touch call answer/end and more with supported softphones. Make the evolution to PC communications simple with the new Calisto 240 USB handset. An LCD display and integrated speakerphone means making calls from your PC is easier than ever. EASES TRANSITION TO PC CALLLING A familiar handset design and phone features An easy-to use-dial pad and call answer/end, volume and mute controls enables seamless PC call management LCD screen for easy call ID viewing and menu navigation EXCELLENT AUDIO Wideband and noise-canceling microphone offer the best PC audio available Built-in, full duplex personal speakerphone offers a high quality audio experience and hands-free convenience PORTABLE Slim, portable design easily fits into laptop bag Powered by USB, no batteries are required Includes protective carrying pouch Ideal for PC telephony users who are in the office or on-the-road and prefer a familiar phone interface