1.Enhanced Variable Frequency Ultrasonic The spider repellent indoor disrupts the pest's nervous system by emitting 60 segments of variable ultrasonic waves per second, which is 55% more effective than previous models. This constant change makes pests very uncomfortable and unable to adapt. 2.Safe to Use This mouse repeller indoor is designed for use around family members and pets. It avoids the need for traditional indoor mousetraps or harmful sprays and provides a clean, easy way to solve pest problems, including use as an indoor spider repeller and bat repeller. 3.Multiscenario Applicable You just need to plug the ultrasonic pest repeller into a power outlet, and when the blue night light comes on, it will start to repel the pests (Tip: We recommend that you continue to use it in order to prevent the pests from reappearing) Energy Saving and Wide Application: the est ultrasonic repellers can help you keep pests out of homes, warehouses, garages, offices, hotels, restaurants, cafes, supermarkets, and apartments. 4.Energy Saving and Reliable This mice repellent indoor consumes a low 35W of electricity, which is both economical and environmentally friendly. You can see noticeable results within 12 weeks, with more dramatic improvements after 34 weeks. For continued protection against pests (including rodents and bats), continuous use is recommended.