Ultrasonic Technology: These ultrasonic repellents are the latest version. They have the ability to repel mice, bats, squirrels, spiders, cockroaches, wasps, ants, crickets, bedbugs, silkworms, mosquitoes, bees and other small pests. More comfortable and safer - our mouse inserts are 100% eco-friendly and effective. The ultrasonic waves emitted by our device cannot be heard by people and pets. An environmentally friendly alternative to harmful and dangerous chemicals, poisons and traps without unpleasant odor. Efficient and wide coverage - Our equipment is suitable for an area of 1600 square meters, which can be used on a large area in residences, warehouses, offices, gardens, hotels, etc. We recommend installing one for each room, as ultrasonic waves cannot penetrate walls and solid objects. EASY TO USE - Plug the pest control device into an outlet. Make sure to install it vertically, 20-80 cm from the ground. And make sure that the surface of the rodent repellent insert is free of