Set Up

To set up the ScareCrow:

Open the battery cover (located under the sensor housing), and install a 9-volt battery.
Check Scarecrow operation. First, turn the sensitivity knob to 4 or 5. Next, wave your hand in front of the sensor lens. You should easily hear the Scarecrow's internal water valve click open, then click closed 3 seconds later. There is an 8 second reset interval after the valve closes when the sensor does not detect motion.
Assemble the stake (with the footrest at the lower end), then attach the sprinkler head and stake to the housing. These fittings should only be hand tightened.
Connect the hose and position the Scarecrow. Aim the Scarecrow towards the area you want to protect. Push the spike into the ground by stepping on the footrest. Do not push on the sensor housing or sprinkler head. If the ground is too hard or otherwise unsuitable for the plastic stake, try placing the Scarecrow in a flowerpot filled with a weighted material like sand or gravel, or you can purchase a ScareCrow mounting bracket.
Turn on the water.

For more on this, refer to the ScareCrow user manual.