1.Anti-interfere function. When someone interferes it with same frequency, the control unit will activate siren to alarm. 2.Support anti-decode with remote control 3.6 programmable Defense zone available, with status LED. The main panel can register 99 sensors and detectors. Every defense zone can set independently arm, disarm, delay alarm and so on. 4.Have the function of “one-key arm”. User can start “Home arm” or “Out arm” freely by keeping pressing one key on remote control 5.Can set the reminder sound of defense zones. Will remind users of remembering arm the alarm system when going out. 6.Can work with other products of our company. Such as wireless big outdoor siren and mini siren and YL-007AS. 7.It stores 2 groups of monitoring center and 6 groups of user phone numbers to dial out and play the recorded message if there is an alarm. 8.Can arm/disarm with remote control or keypad on the main panel 9.Can arm/disarm/listen-in by calling the host phone number (The phone numbers of main panel). 10.Have the function of reminder for circuitry failure. For example, if telephone line is cut or short, the main panel will alarm. 11.Have the superior of connection 12.Have in-built backup battery and can continue to work and last for 8---10 hours when electricity is cut or in failure.