Yealink EXP50 Color-screen Expansion Module for Yealink T5 Series IP phones, including SIP-T58V/SIP-T58A/SIP-T56A
"Color-screen 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 lluminated LED for fast switching pages
• Supports up to 3 modules daisy-chain
• Stand with 2 adjustable angles"