360 Frequency Conversion Ultrasonic Repellent: Bogutongjin Ultrasonic mosquito repellent can emit sound waves of 18 different frequencies in 360 degrees, including ultrasonic waves, electromagnetic waves and bionic waves. Ultrasound and electromagnetic waves can interfere with the nerves of rats and mosquitoes and destroy the living environment of rats and mosquitoes. It drastically takes over the number of rats and mosquitoes until it is not everyone. Ultrasonic by topi: Ultrasonic repeller In addition to the ultrasonic unit, an optical unit function has been added. Experiments have shown that mice do not like light and like dark, damp rooms. Optical unit function can achieve good results (flashing frequency of 180 seconds is a period, from high frequency flashing to low frequency flashing, so as to avoid rodent adaptation) Convenient, Wide Air Coverage: The ultrasonic mosquito repellent can be used just by plugging it in which is very convenient. In a completely open environment, the effective height of the ultrasonic mosquito repellent is 0.5 - 1.5m, and the effective range is about 50-160 . Long-term use is better. If there is a dividing wall, the effect will be reduced. Wide Range of Use: Ultrasonic for Mickey can effectively repel mice, mosquitoes, flies, cockroaches, spiders, insects, etc It can be used in living room, hotel, bedroom, basement, parking lot, office, kitchen and cabinet, able to meet your multiple needs. Safe and Energy Saving : Ultrasonic mouse repeller is made of ABS material, flame retardant, high strength, high temperature resistance, non-slip and durable. It has very low operating sound and is safe to use for pregnant women and children. No peculiar smell and no pollution. And the screen will automatically turn off after 25 seconds and enter power saving mode, which will not affect sleep.