Do you have rodents in your home? Don't want to use poison, chemicals or dangerous traps? Why not choose us? Rodent Repellent, Unlike a mouse trap, or chemicals , the ultrasonic device is effective, eco-friendly and without any risk. Feature: Non-toxic environmental friendly 1, No chemicals and sprays, won't hurt your pets. 2, No noise, won't annoy you. 3, No radiation, safety. 4, Easy to use, just plug it into the outlet. Parameter: Ultrasonic frequency: 22~65KHZ Voltage input: AC90V~250V / 50Hz~60Hz Power: 5-6W Effective coverage area: About 60-120 square meters Note: 1) The mechine should be installed 80~120cm from the ground, and should be vertical to the ground and connected to the outlet (better effect). 2) One unit for each room is recommended dice for the best result, because the solid like wall, furniture and so on, will weaken the effect of ultrasonic wave. 3) Usually it may take 1~3 weeks to notice the results. The number of pests and insects may increase in the first days.