Long press SET button, then enter into parameters setting mode. There are two groups of parameters for the users to choose, P0, P1. In the current mode, short pressing SET button can switch the parameter groups between P0 and P1. In each mode, you can press ↑button or ↓button to adjust the working mode you need.

P0-0: The timing mode of T1 is second.

P0-1: The timing mode of T1 is minute.
P0-2: The timing mode of T1 is hour
P1-0: After T1 time delay, the relay pulls in.(T1 timing)
P1-1: After T1 time delay, the relay releases.(T1 timing)
P1-2: After T1 time delay, the relay pulls in (T1 timing). Then after T2 time delay, the relay releases (T2 timing).
P1-3: After T1 time delay, the relay releases (T1 timing). Then after T2 time delay, the relay pulls in (T2 timing).
P1-4: After T1 time delay, the relay pulls in (T1 timing). Then after T2 time delay, the relay releases (T2 timing) and repeat the cycle.
P1-5: After T1 time delay, the relay releases (T1 timing). Then after T2 time delay, the relay pulls in (T2 timing) and repeat the cycle.

Example: someone need to turn on after 10 seconds, then turn off after 20 seconds and repeat the cycle.
The setting method is as following:
T1 is set to 10 and T2 is set to 20
Choose P0-0 (The timing mode of T1 is second.)
Choose P1-5 (The working mode of the relay is working firstly then stopping working and then repeating the cycle)