1.it can connect 64 channels smoke/heat detectors(0,1-63); 2.It can save 4 groups telephone number; 3.Two dial methods- tone(T) and pulse(P) is choice; 4.After power cut off, the saved information will not lose; 5.Record function; 6.Automatically play function; 7.Long-distance intermit dialing function; 8.Avoiding keypad falsely-press function, and need use unlock key to unlock. 9.Besides controller panel's system state indicate, it can match with several displays device to indicate system state. 10.All smoke/heat detectors are two-wire parallel connected to controller.