Dual Ultrasonic Technology Yokiss Dual Ultrasonic Pest Repeller adopts frequency conversion technology to emit powerful dual ultrasonic waves. Sends out ultrasonic frequencies of 22-65Khz to disrupt the central nervous system of pests, thereby drivingthem out of your home. Safe and environmentally friendly, no chemical substances. non-toxic. tasteless. Quiet and no radiation. It is harmless to the health of humans and pets. Just connect the ultrasonic mosquito repellent to the air outlet 80-120cm from the ground, and themosquito repellent can work 24 hours a day. No additional equipment maintenance is required. Effective against most pests Yokiss Ultrasonic Repellent keeps all kinds of insects away from your home. Like a mouse. mosquito. spider. insect. Ant. fly. cockroach. Fleas and other pests. Wait until there are no dead bodies of pests. Ideal for use inthe living room. kitchen. bedroom. storehouse. etc. Wide coverage area The effective coverage area of the insecticide is 80-100 square meters. Full 360 degree coverage. But he can't walk through walls. Installing one type of repellent in a room ormultiple repellants in a larger room is more effective. Products from NIUNIU's store