After power, D1 flashes for 3 times, D2 off, M+ output positive, M- output negative, motor forward; After a time delay T1, D2 on, M+ output negative, M- output positive, motor reversal; After a time delay T2, D2 off, M+ output positive, M- output negative, motor forward; And so on.
T1: motor forward delay time, default 0.1-5000 seconds adjustable (step 0.1 seconds)
T2: motor reverse delay time, default 0.1-5000 seconds adjustable (step 0.1 seconds)
By "Time multiple selection" setting, the maximum delay is up to 40,000 seconds

How to Set Up:
After power on, D1 3 blinks, enter the "work mode"
D2 on Reversal, D2 off Forward
Press and hold the key for 2 seconds, D1 on, enter the "setup mode"
D2 off, It's forward "setup mode"
In forward "setup mode", continuously trigger KEY twice, D1 off, enter "Standby timer mode"
In the "Standby timer mode" , trigger KEY to start timing(enter "Timing Mode")
D1 flashing means it is timing("Timing Mode")
Trigger KEY again to stop the clock(exit "Timing Mode")
D1 flashing time is forward time(T1)
Press and hold the Key for 2 seconds, D2 on, enter the Reverse "setup mode"
In Reverse "setup mode", continuously trigger key twice, D1 off, enter "Standby timer mode"
In the "Standby timer mode", trigger KEY start timing(enter "Timing Mode")
D1 flashing means it is timing("Timing Mode")
Trigger KEY again to stop the clock(exit "Timing Mode")
D1 flashing time is Reverse time(T2)
So far, forward time(T1) and reverse time(T2) is set up
Re-power in "work mode"