【Safety to use】The frequency conversion insect repellent uses frequency conversion technology to affect the hearing and nervous system of the pests. No sound, no chemicals, no poisonous gas, no smell. It is harmless to the health of humans and pets. 【How it Works】These repellers send ultrasonic waves to confuse and disturb pests so they can’t find food or nest there, driving them out of your home. Insect repellent for mice, mosquitoes, ants, mice, cockroaches, spiders, bugs, rodents, etc. 【Large Coverage Area】Dual microchip system equipped with ultrasonic insect repellent, suitable for area around 100 square meters. Since ultrasonic waves cannot penetrate walls and solid objects, in order to improve the effect, it is recommended to use a one-chamber, one-insect repellent. 【Easy to use】Just plug it into the power socket, press the switch, the automatic intelligent ultrasonic frequency conversion destroys the living space of the pests, and the repeating ring will disturb the auditory
