"DC 12V 20A Programmable Digital Relay Timing Delay Switch ModuleBrief description:Please pay attention to your first use. You need to wait 6s after setting the data, the module will save the date you set after 6s.Short press the ""SET"" key: start the time setting mode, the screen flashes. Please adjust the T1 time by flashing. Press the "SET" button and the screen will flash again. Set time T2 when flashing. Then use two methods to record together: 1. Wait 6S, the screen stops flashing. The system automatically saves the set time; 2. Press the "SET" key.Long press the ""SET"" key: start the setting mode. There are parameters to choose from: P0 and P1. You can select P0 or P1 by short pressing ""SET"". Parameters can be adjusted using the up and down keys under parameters P0 and P1.Restart button: Restart the function. After the timer is finished, it works normally. To work again, short press the "Restart" button to restart the timer.""