Product Description Because this product is a physical repellent, it usually takes 1-4 weeks of continuous use to show its effect: rats, mosquitoes, cockroaches, etc. will be significantly reduced and they will escape due to the alternating stimulation of ultrasonic and infrasonic waves. . In areas with less rodent damage, more obvious effects can be seen in 1 week; in some areas, rats and cockroaches will be more active/running in the first 3-5 days. This is a normal reflection: this is due to rats, mosquitoes and cockroaches receiving the interference stimulation of ultrasonic and electromagnetic waves from this product and producing neurological disorders and irritable physiological reactions. This product has no adverse effects on the human body, please rest assured to use Precautions for safe use: 1. Install the 220V power socket on the wall 20-30 cm from the ground (the power left by the house decoration is almost at this height), and keep it perpendicular to the ground (remember that the product cannot be placed on the ground). 2. There should be no large obstacles within one meter of the front of the product (i.e., it should not be installed on the back of objects such as refrigerators, wardrobes, sofas, etc.). 3. The product should first be installed in the area where the pests are most serious. After the pests in this area are eliminated, the product should be installed in the relatively central position of the whole house (such as the living room) or where the pests are most likely to enter. 4. The product must work continuously for 24 hours during use. The flashing frequency of the indicator light changes with the frequency of the electromagnetic waves. The shell is made of flame-retardant material (ABS flame-retardant plastic material), which is safe and reliable. Therefore, the product can only drive away mice, but cannot directly kill them. In the environment where this product is used, mice will suffer from confusion, loss of appetite, and apathy. It is easy to drive away and kill rats when they go to places where rats often come and go. Therefore, it is best to use the product and the mouse rodent together