ID #1112 Does Audio handsfree have "room to room", "home to home" and "broadcast" function in Welcome M? Leo-Yangeng.Li 09.03.2017 09:16 0 Comments Audio handsfree indoor station has "room to room". That means it can call to the same address But audio handsfree doesn’t have "home to home"(different addresses) and "broadcast" function. Tags: DES, Security