TWO ULTRASONIC MODES: With an upgraded chip, our ultrasonic pest repeller has two modes. Yellow light for mice repellent mode and red light for insect repellent mode. ALL pests will be forced out of your home. WHOLE-HOME PROTECTION: One unit of the pest repellents is effective in an area up to 1200 sq. ft. We recommend you install one unit per room for the fastest and best result. CHILD & PET SAFE: Our pest control features no chemicals and 100% safety. You can drive out mice, rats, rodents, ants, spiders, and cockroaches without worrying about children or pets. EASY TO USE AND CLEAN: Just plug pest repeller into the socket and press the button for the function you want, then we can say goodbye to pests within one month.