Yealink EXP43 Colour Expansion Module Price in London, UKYealink EXP43 Technical Specification Display 4. 3" 272x480 pixel colour display with backlight 16 bit depth colour Three page views are possible Different colour icons for each function shown on the LCD Features Keys and Indicator 20 physical keys each with a dual colour LED 40 additional keys through page switch 3 independent control keys with illuminated LED are used for fast switching pages Programmable for shared line, BLF List, call park,