Product Description Since this product is a physical repellent, it generally takes 1-4 weeks of continuous use to show the effect: mice, mosquitoes, cockroaches, etc. will be significantly reduced and escape due to the alternating stimulation of ultrasonic and ultrasonic waves. Infrasound waves. In areas with low rat infestations, more noticeable results can be seen within 1 week; in some areas, rats and cockroaches will be more active/running around within the first 3-5 days. This is a normal reaction: this is because rats, mosquitoes, and cockroaches are stimulated by the interference and stimulation of ultrasonic and electromagnetic waves of this product, causing nervous disorders and irritable physiological reactions. This product has no adverse effects on the human body, please feel free to use it. Precautions for safe use: 1. Install the 220V power socket on the wall 20-30 cm away from the ground (the power supply left over from home decoration is also at about this height), and keep it vertical to the ground (remember that the product cannot be placed on the ground). 2. There must be no tall obstacles within 1 meter of the front of the product (that is, it must not be installed on the back of refrigerators, wardrobes, sofas, etc.). 3. The product should be installed first in the area with the most serious pests. After the pests in the area have been eliminated, the product should be installed in a relatively central location in the house (such as the living room) or where pests are most likely to enter. 4. The product should work 24 hours a day during use. The flashing frequency of the indicator light changes with the change of the electromagnetic wave frequency. The shell is made of flame-retardant material (flame-retardant ABS engineering plastic material), which is safe and reliable. Therefore, this product can only repel rats but cannot directly kill them. In an environment where this product is used, mice will develop symptoms such as confusion, loss of appetite, and listlessness. It is easy to kill mice when you go to places where mice often hang out, so it is best to use this product with a mouse stick