Set channel to turn off in two hours


I have a Sonoff 4 channel pro and 2 channels are connected to 12 V irigattion valves. How can I make a channel to stay opened for two hours and then turn off? The inching option is for max. 1 hour.
Thank you. Have a nice day

You can set a time to turn on and another to turn off.

It could be done with a manual scene.

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Thank you, I’ll try it. I have tried with " delay" but not like this.

Thank you. I want to be an automatic process because I use it regularly with a pump. When the pump is on I want the valve to be opened for 2 hours

You can put an external timer on each channel.

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Thank you. Good to know.