... when you are out9, Built-in artificial intelligent English message for alarm system 10, Can support all kinds of wireless sensors, such ... , when power is on, will also alertTechnical parameter for the gsm alarm system wireless:Operating voltage: Input 100-250V, output 12V. ... the gsm alarm system: a main panel, a wireless PIR detector, a wireless door/window gap detector a siren, two remote controllers, ...