Check the listing for details. Yealink EXP43 T4U Series Expansion Module. Color: Black, Condition: New. Listed at 108.95 USD. Yealink EXP43 T4U Series Expansion ModuleThe EXP43 expansion module is a great add for users who need extra keys. The EXP43 has an elegant design and a beautiful color display.EXP43 Features:4.3" 272 x 480-pixel color screenColor icons for rich visual experience20 physical keys on each page with dual-color LEDsThree independent control keys with illuminated LED for fast switching pagesSupports up to 3 modules daisy-chainStand with 2 adjustable anglesCompatible only with T43U and T46UWe Accept PayPal and Credit Cards. We are Adcomm Technologies LLC. , We are located in Secaucus NJ. Text Example We are an authorized Yealink reseller. Products purchased will have an authentic Yealink replacement warranty. We do bulk sales and custom quotes for corporate and our reseller partners, please inquire if you have these needs.