The Yealink EXP43 Color Expansion Module is designed to expand the functional capability of your Yealink T43U/T46U/T48U IP phones by adding 60 multi-functional line keys such as BLF, speed dial, call forward, transfer, call park, call pickup, and more. Features 4.3' 272 x 480-pixel color screen Color icons for rich visual experience 20 physical keys on each page with dual-color LEDs 3 independent control keys with illuminated LED for fast switching pages Supports up to 3 modules daisy-chain Stand with 2 adjustable angles