1) wireless LCD display telephone system with voice 2) 44wirelesss/ 7wired 3) LCD, ... HOT on sale wireless LCD telephone alarm system with voice home alarm system The sn5900 is a very powerful landline ... center station operator can speak directly with the user to make sure whether it is a real ... Station, when the panel alarms and auto dial, the user can listen in, speak, sound siren, disarm remotely ...