160 x 320 graphic LCD display, 16-level grayscale, LCD backlight. 20 physical dual-color LED keys, 20 additional keys through page switch, 2 independent control keys. Stand with 2 adjustable angles. Wall mountable. Program up to 40 features. Supports up to 6 expansion modules, 240 additional buttons. Designed to work with Yealink SIP-T46G IP Phone.