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SN685 (Receive Center) +SN2300 (Wired/Wireless Control Panel) +Beam IR and other detectors are key products of our company. They are popular to people since they have good performance. Esp. the receive center, wired/wireless are compatible and support the ADEMCO.
1. If want to add users, a card needed. SN685 can have at most 8 cards at the same time and can be used by 100000 users;
2. SN685 can display/memory 999 alarm messages and display the number of user, the type/zone number/time of alarm and so on. All the info can be printed by the printer connected with SN685 while others can not do this;
3. Receiver Center + Computer (used by the police) . If the computer is attacked by virus, shut down or the hard disk is damaged, the receive center still can receive alarm to avoid losing the information;
4. Built in contract ID, so it can be compatible with DSC, ADEMCO, EL, ROKEL, DS and so on.