The Yealink EXP50 Color-screen Expansion Module for Yealink T53/T53W/T54W/T57W/T58A/T58W IP phones is designed to expand the functional capability of your SIP phone to a whole new level. It features a large 4.3-inch color-screen LCD, giving you a vivid visual experience. In addition, it provides you with a simple user interface and advanced call-handling capabilities. For example, three pages of 20 flexible buttons shown on the display can be programmed up to 60 various features. The functionality of Yealink T53/T53W/T54W/T57W/T58A/T58W IP phones will also be extended by the EXP50, you can set the provided multifunctional line keys as BLF, speed dial, call forward, transfer, call park, call pickup, etc. The Yealink EXP50 Color-screen Expansion Module is an ideal solution for receptionists, administrative assistants, and contact center workers and gives you the ability to monitor contacts and manage a large volume of calls with ease.