A spray of water at moderate garden hose pressure is usually considered harmless as it does not cause any permanent damage. Nonetheless, if it were abrupt enough, delivered when least expected, it can be surprising and even scaring. It can thus be used to protect your garden or pool from unwanted animals.
The Ningbo Elite Electronics Technology Motion Activated Sprinkler delivers exactly this. It is activated by an electronic sensor that detects movements within a 90 square meter area. Depending on its sensitivity setting, it can easily detect large animals such as deer beyond 8.5 meters. Smaller animals such as cats or rabbits are sensed at about five meters.
This contraption from China is powered by a single 9-volt battery that can last for up to six months operating 24 hours a day. Based on the average number of times the sprinkler is activated, this would be equivalent to 3,000 plus activations. Even with this small battery, it can accurately shoot water as far as 8.5 meters.
Only two to three cups of water is sprayed for each activation. This is normally sufficient to scare unwanted animals off your protected area. The water is free of chemicals or any other harmful material, and thus will not inflict any permanent harm to the animal, nor damage to your garden or pool.