[Two Input Ports] You can choose the micro-USB 5V port or the screw terminal port to supply power at the input to make the pcb board work. [Dry Contact/Passive Output] No matter how much power you input, the output not have any power voltage If the output port does not supply power, the connected home appliances cannot work, and the output port also needs power supply. [Timer] Connected home appliances can be automatically turned on/off according to the schedule. Different schedules can be set for each channel. Different control methods of WIFI module [APP Remote Control] You can control connected home appliances, such as lamps, electric kettles, rice cookers, electric curtains, etc., in Tuya or Smart Life APP anytime, anywhere [Mobile phone control] As long as you add the device in the APP through 2.4G WIFI, you can control the device in your smartphone through 2G/3G/4G mobile network or WIFI. (Note: The router needs to be online, and the WIFI module needs to be close to the router)