Upgraded version of ultrasonic mosquito repellent uses the latest ultrasonic frequency conversion technology, can intermittently emit four kinds of different ultrasonic frequencies, compared with other fixed frequency ultrasonic mosquito repellents, ultrasonic mosquito repellent makes pests harder to produce "adaptability" and "immunity", the expelling ability is more powerful and efficient. professional, not only can automatically generate frequency converted ultrasonic waves, but also emit bionic waves, simulate the cries between mice or other pests, double stimulate mice, mosquitoes and other pests, make them unable to bear and can only flee . 100% SAFE - The ultrasonic insect repellent uses pure physical mosquito repellent technology, non-toxic and insip ide, the ultrasound generated mainly attacks the auditory system and the nervous system of the pests, forcing them to flee. Even if they cannot escape, they will lose the ability to reproduce and invade. Humans and pets cannot hear these ultrasonic waves, and there will be no harm to humans and pets. ENERGY SAVING AND ENVIRONMENTAL PROTECTION - After repeated testing, designed a more energy-efficient ultrasonic mosquito killer, the power consumption is only half of that of other similar products. Can be used 24 hours a day continuously. Use the latest ABS flame retardant materials, safe and environmentally friendly.