Yealink T4U series Expansion Module

- 4.3" 272 x 480-pixel color screen
- Color icons for rich visual experience
- 20 physical keys on each page with dual-color LEDs
- Three independent control keys with illuminated LED for fast switching pages
- Supports up to 3 modules daisy-chain
- Stand with 2 adjustable angles
- Compatible only with T43U/T46U/T48U