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

Manufacturer Link: https://www.yealink.com/product/accessories-exp43

Warranty: 12