Specification: Item Type: Relay Module Voltage: AC 100-250V Power Consumption: N line is connected to load N line, most appliances do not need to strictly distinguish LN line -->The live wire is connected to the load L wire. Most appliances do not need to strictly distinguish the LN wire. -->Normally closed end of the L wire output of the live wire normally closed terminal, generally need not be connected. Instructions: Time can be set under power on and power off First determine the range and unit of the delay. The two DIP switches control the on-time and off-time at the same time. They are shared. The first bit of the DIP switch is used to set the adjustment range. The OFF position is 0-10 and the ON position is 0-1000. The second bit of the DIP switch is used to set the time unit. The OFF position is seconds and the ON position is minutes. Package List: 1 x Relay Module Note: The position of the potentiometer can also be quickly located by measuring the voltage. The minimum adjustment of the central arm is 0V, and the highest position is 5V. For example, it needs to be adjusted to 20, that is, 20/100 * 5V = 1.0V; if it is to be adjusted to 30, then it is 30/100 * 5V = 1.5V.