There is only one button on the Hose Faucet Timer, but it does serve several different functions. Here are those functions.
Hold the button for 2 seconds, the light will blink green for 2 seconds and your manual watering will begin (duration set in the settings page of the app).
Rapidly press the button 5x within 2s, the light will blink red for 2 seconds. This has reset the timer and put it back in pairing mode.
Press the button. The light will blink yellow for 2 seconds. This cancels auto watering and Rain delays.
Devices Covered: 04138 21205