【Automatic Frequency Conversion Technology】The new generation of ultrasonic repeller has three wave bands: ultrasonic wave + sawtooth wave + bionic wave, the frequency will automatically change according to different working modes. rats, cockroaches, etc. cannot produce “adaptability” and “immunity” to the frequency of changes. 【Latest 4 Modes Ultrasonic Repeller】 Ultrasonic Repeller with a new generation of adjustable four modes. The first level is used to hunt mice, the second level is used to hunt mosquitoes, the third level is used to hunt cockroaches, and The fourth mode increases the ultrasonic frequency, which is suitable for hunting various pests and rodents. (The fourth mode is only available in an environment without people). 【100% Safe For Children and Pets】Ultrasonic repeller is safe, non-toxic and non-radiant. With advanced ultrasonic and sawtooth wave control, you can eliminate insects, mice, cockroaches, ants and spiders without worrying about children, cats or dogs.