... can use O1 and other circuit to control home electrical apparatus, such as lamp, cooker, ... can use O2 and other circuit to control home electrical apparatus, such as lamp, cooker, ... use O3 and other circuit to control home electrical apparatus, such as lamp, cooker, ... Wireless Infra Red Detector ,door sensor, or remote controller in the system, you can open the power of Wireless Wireless GSM Alarm System ...