The Yealink EXP43 brings a rich colour screen expansion module to the Yealink T4U series phones. The Yealink EXP43 is compatible with the Yealink T43U, T46U and T48U phones and will adapt to match the display of the IP Phone it has been connected to, monochrome for T43U and colour for the T46U and T48U. 4.3" 272x480 Pixel colour LCD, 20 Physical keys, dual colour LED, 40 additional keys via page view, Up to 3 expansion modules per phone, PSU's required for expansion modules 2 & 3, Adjustable stand.