The KlikAanKlikUit Motion Sensor ALMDT-2000 detects movements of unwanted visitors at home. When the motion sensor detects movements, it gives a signal to the ClickOnClickOff siren. This then produces a sound of 100 decibels. The sensor also performs at night thanks to the infrared sensor. With a range of up to 15 meters and a horizontal detection angle of 120 degrees, you make your home a lot safer.