• JUCHENG ultrasonic pest repellents use physical ultrasonic methods to effectively repel all kinds of pests. • Simply plug in the JUCHENG pest repellent to emit ultrasonic waves of 20 ~ 55 KHZ. • It stimulates the auditory and nervous systems of mosquitoes, cockroaches, mice, mites, and other pests. • Continuous process to repel pests: Week 1 rapid impact, Week 2 nervous system damage, Week 3 to 4 intolerable. • Effective against mice, rats, mosquitoes, cockroaches, moths, ants, spiders, bedbugs, and more. • Ultrasonic waves do not tangle between walls, install 1 device per room. • Keep doors and windows closed to prevent pests from escaping the ultrasonic sound. • Wait about four weeks for full results. • Rated power: 5W, Voltage: AC90~220V, Frequency: 50~60 HZ. • Dimensions: 9x6x5CM, Weight: 0.32 kg. • Effective product range: 80-120 square meters. • Package includes: 4 packs.