Principle of ultrasonic mosquito repellent According to zoologists' long-term research, female mosquitoes need to supplement nutrition within a week after mating in order to ovulate and produce smoothly, which means that female mosquitoes only bite people and suck blood after pregnancy. During this period, female mosquitoes can no longer mate with male mosquitoes, otherwise it will affect production and even worry about life. At this time, the female mosquito will try to avoid the male mosquito. Some ultrasonic mosquito repellents simulate the sound waves of various male mosquito wings shaking. When the blood sucking female mosquito hears the above sound waves, she will immediately escape, so as to achieve the effect of repelling mosquitoes. According to this principle and using this feature, the ultrasonic mosquito repellent designs an electronic frequency conversion circuit to make the mosquito repellent produce ultrasonic waves similar to the wings of male mosquitoes, so as to drive away female mosquitoes. Principle of ultrasonic rat driving Animals such as mice and bats communicate with each other through ultrasound. The auditory system of mice is very developed and sensitive to ultrasound. They can judge the source of sound in the dark. When threatened, young mice can send out 30-50KHZ ultrasound. When they don't open their eyes, they can rely on the ultrasound and echo to return to their nest. Adult mice can send out an ultrasonic call for help in case of crisis and can also send out ultrasound to express happiness during mating, It can be said that ultrasound is the language of rats. The purpose of this kind of activity is to make the rats feel panic and even convulsion in the range of 200hz-900hz, so that they can escape from the rat's auditory system effectively. Product parameters Product Name: ultrasonic insect repellent Use power supply AC 90 ~ 250V Average power consumption < 1W Ultrasonic frequency 20 ~ 65khz Driving range: 15 ~ 30 Material: ABS high quality fireproof and flame retardant material Products have certification: CE, FCC, Rosh, EPA, PSE, quality inspection report Product features: exquisite appearance (with small night light function), ultra small volume, light weight (convenient transportation, saving logistics cost), environmental protection, safety and no peculiar smell. Mute energy saving Physical mosquito control Electric shock mosquito trapProducts from NIUNIU's store