Physical Repellent: Using the principle of ultrasound, changing the frequency to stimulate the ear system of mosquitoes and other pests, making them intolerable and uncomfortable. Not irritating to humans or pets.The high-frequency ultrasonic circuit is not only effective for mosquitoes, but also for most rodents such as cockroaches, ants, spiders, mice and other insects.No added chemicals: no radiation, harmless, non-toxic, wide coverage, ultrasonic waves cannot penetrate walls. We recommend that you install one device per room.Night Mode: Plug in the repellent and the LED lights will turn on like a night light, giving you nighttime safety.It extends over a large area and can occupy an area of80-120 m. It can be placed in the living room, bedroom, kitchen, bathroom, etc.1. Install the 220V power socket on the wall 20--30 cm away from the ground (the power supply left by home decoration is almost always at this height), and keep it perpendicular to the ground (remember that the product cannot be placed flat on the ground). 2. There should be no tall obstacles within 1 meter of the front of the product (that is, it should not be installed on the back of refrigerators, wardrobes, sofas and other objects). 3. The product should first be installed in the area with the most serious pests. After the pests in the area are eliminated, the product should be installed in the relatively central position of the whole house (such as theliving room) or the place where the pests are most likely to come in. 4. The product should work 24 hours a day during use. The blinking frequency of the indicator light varies with the frequency of the electromagnetic wave. The shell is made of flame retardant material (flame retardant ABS engineeringplastic material), which is safe and reliable.Specifications: US standardQuantity shipped: 1 piecePackage Contents: Only the above package contents, excluding other products.Size: 10*6.5*5.5cm(Reminder: The size is measured by hand, please allow 1-2 cm measurement error)color: White(Due to different monitors and lighting effects, the actual color of the product may be slightly different from the picture color.)