Vertical Communications V11000 1.9Ghz DECT Digital Cordless phone with 240x320 Pixel Full Color LCD Display, 4 Menu Accessible Flexible Function Buttons, 4 Menu Accessible Quick Dial Buttons, 4 Soft Keys, 4 Fixed Feature Keys, 2.5mm Headset Jack, Vibrating Ringer, and Speaker Phone Function. Supports up to 6 V10000-20 Range Extenders. For Vertical SBX-IP, MBX-IP, Summit-IP and Wave Systems.