Ultrasonic Technology: Ultrasonic mosquito re-pellent uses advanced ultrasonic technology, which interferes with the nervous system of insects such as mosquitoes, making them feel uncomfortable and keep away from your home or office. Safe and Non-Toxic: Ultrasonic insect re-pellent uses ultrasonic technology to repel pests instead of killing them, no need to clean up dead bodies, non-toxic, no chemicals, no smell, no noise. Low frequency, inaudible to humans and pets, harmless to humans and pets. Widely Used: The electronic mosquito re-pellent effectively protects you from mosquitoes, flies, ants, cockroaches and other insects. It is the best companion for camping, climbing, running, traveling, fishing, hunting and other outdoor activities. Lightweight and Portable: The electronic mosquito re-pellent is small and lightweight, with a keychain, you can hang it around your neck or hang it on your backpack and carry it anywhere. Effective Repelling: Built-in high-quality and efficient ultrasonic microchip, the rechargeable electronic mosquito re-pellent can work continuously for 7 days, and has a strong battery life. This insect re-pellent is suitable for repelling many kinds of insects: mosquitoes, flies, cockroaches, ants, moths and other insects.