Forget the harmful chemicals, poisons and traps commonly used by home and pest control technicians. Pest repellents are absolutely safe around you and your family. Repel pests naturally without killing them. No need to clean up dead insects and rodents. Pest repellents create an uncomfortable environment for pests, so they usually only go away after a few weeks of use. Ultrasonic repellers emit ultrasonic waves that are very uncomfortable for squirrels, mice, rats, insects, etc., causing them to leavethe room. This item is for indoor use only. Although these devices are designed to repel insects and pests, they may also be susceptible to high frequency sound sensitive rodents such as mice, squirrels, rats and small animals. Because insects, rodents, bugs and other pests are repelled. Consists of sensors and two speakers that emit pressure waves high shock loads and 25kHz to 60kHz ultrasonic sound to effectively control squirrels, rats, mice and most other common mice. Delivery Quantity: 1pc Package Contents: Only the above package content, other products are not included. Size: 12.15*12.15*7.6 cm (Reminder: The size is measured manually, please allow 1-2 cm measurement error) Colour: Black (Due to different monitors and lighting effects, the actual color of the item may be slightly different from the color shown on the picture.)