Description: Parameter setting: Hold down the set key to enter the parameter setting mode. There are three groups of parameters for you to set P0, P1, and P2. P0: timing range, P1: working mode, P2: display brightness adjustment. P0, P1, and P2 can be switched by pressing the settings key for short time. You can add or subtract the corresponding parameters by pressing the key. P0--0 indicates that the timing range is 0.1 seconds. P0--1 means the timing range is seconds. P0--2 indicates that the timing range is minutes. P0--3 indicates that the timing range is hours. P1--0: relay pulling and closing after delay T1 time (T1 timing). P1--1: Relay release after delay T1 time (T1 timing). P1--2: The relay is pulling and closing after delay T1 time (T1 timing), and then released after delay T2 time (T2 timing), ending. P1--3: the relay is released after the delay of T1 time (T1 timing), and then the relay is pulling and closing after the delay of T2 time (T2 timing), ending. P1--4: after delay T1 time, relay pulling and closing (T1 timing); after delay T2 time, relay release (T2 timing), repeat the cycle. P1--5: The relay is released after delay T1 time (T1 timing), and then the relay is pulling and closing after delay T2 time (T2 timing), and the cycle is repeated. P2--0 to P2--5 is the display brightness adjustment, the user can set according to comfort. P2--OFF: low-power mode. If you set P2 to OFF, the system will automatically turn off the display for 10 seconds and enter the low-power mode. Press any key to wake up. Specification: Material: as shown Size: 7.1*3.9*2.5cm / 2.8*1.5*1.0in Packing list: 1 x Timer Delay Relay Module