It adopts the principle of infrared detection, and sends out ultrasonic waves to drive away small animals while detecting small animals. It can help you stay away from pesky stray dogs, cats and other small animals to protect your property, your garden and your yard.Because it is a portable design product, it can be installed anywhere in your home, garden, or courtyard. This product can be used with low-voltage power sources and batteries. This product just drives animals without any chemicals attached. It just emits 25kHz Ultrasound drives them away. It wont do any harm to the human body1) Speaker: This product can emit high frequency to drive away animals.2) PIR motion detector: This is an infrared transmission sensor that continuously outputs signals. When it senses that there is a moving animal in the detection range, it will automatically send out a sound wave frequency to drive the animal away and the LED indicator will light up accordingly.3) LED indicatorSolar panel: 5.5V 0.11W, amorphous siliconBatteries: 4x 2/3AA 300MA NI-MHFrequency: 25KHZ-60KHZRange: 6-8m in a 110 fan-shaped area in frontMaterial: ABSProduct size: length 38*width 14.5*9.5cmPacking: 1* Mouse Repeller