It has a highly sensitive infrared sensor that operates unattended and sprays when movement is detected. It senses small or large animals and operates 24 hours a day. The energy-efficient circuits operate for up to 6 months (or 3000 cycles) on one 9-volt battery (not included). Attached to your hose, it uses only 2 to 3 cups of water per event, so it can usually be used in communities engaged in water rationing.
The smart circuitry automatically dampens sensitivity in windy conditions to prevent false triggering. An adjustable sensitivity control changes the distance the unit can "see". Detection range is 10' to 30'. Assembles quickly by hand without tools. Optional scarecrow decals are included. Measures 24" tall. Ideal for keeping night "visitors" (including deer) out of your gardens.
Battery should be replaced every year for best performance.