Product use steps: First enter the clock setting screen through the "CLOCK" button, and adjust the timer clock to the current actual time through the "R/L" and "+/-" button (press the OK key after setting).Then enter the timing setting screen through the "SET" button, and set the timing time required by the user through the ''R/L" and "+/-" button. After setting a group, you can press "Next" button to enter the setting screen of the next group (you cannot press the "OK" button at this time), up to 8 groups of timing, after setting all timing time, press the "OK" button to start execution, very simple. The function of the "ON/OFF" button is to change the current output state of the timer jack. For example, the current jack of the timer is on, if the user wants to change the current output state to off, you need to press the "ON/OFF" button continuously to change the current state, after it becomes "OFF", then press the "OK" button. At this time, the timer's timing function will not be affected, and it will continue to execute as planned. There is a small detail to note here, after the timer has set the timing, it will not automatically determine whether the current jack should be on or off, it will only default to the output state before the set. If the output state of the jack does not correspond to the set time, you can change the output state to the correct output state through the "ON/OFF" button and then press the "OK" button. This feature is to prevent some users from forgetting that someone is operating on the device, at this time, if the setting is changed and the power is automatically turned on and off, it will cause an accident, so our design is for safety.