Plantronics Calisto P830-M PC/Mobile/CO Speakerphone. Experience a whole new way to manage PC landline and mobile phone calls with the Plantronics P830-M Calisto 800 Series multi-device speakerphone system. Featuring a 2.4" color display and a touch-sensitive dial pad for easy caller ID viewing dialing answering switching and muting across devices you have call control like never before. Size: 7" x 6" x 7"