Q: Why is KV9503's contact interface modular, and how can it be displayed as a contact list?
A: The device will have different UI interface display depending on the number of indoor units added. 1) If added indoor station quantity is less than 4 (include 4), the users will be showed as nametag mode； 2) If added indoor station quantity is more than 5 (include 5), the users will be showed as contact list mode. Or you can also switch to keypad mode to input room number manually.