Effective Pest Chaser Designed with ultrasonic transducer and dual ultrasonic speakers,the chaser can emit ultrasonic sound at frequency of 22-35KHz or 25KHz,perfect for chasing rats,mice,roaches,fleas,spiders,mosquitoes,ants and most of the other common pests. It's able to repel most pests around the pest chaser about 3229 sq.ft effectively. 4 Working Modes Comes with 4 function switches, including TEST, ULTRA, TRANS and DUO. Our rat chaser allows you to select different modes to use different frequencies against different rodent species, such as squirrels, mice, rats and other rodents. The automatic frequency conversion design of the ultrasonic wave can prevent rodents from getting used to the ultrasonic wave of a certain frequency. Human &amp. Pet Safe The ultrasonic sound specially designed above the rodent hearing, is safe for humans, children, mothers, babies, cats, dogs and all household electronics. No poison and chemicals, super environmentally friendly. 9 LED Strobe Lights 3 LED strobe lights on each side, a total of 9 LED strobe lights, which cover the entire environment in an all-round way. Press the LED button to turn on the light mode and then the lights will automatically flash to disturb the rodent's vision in a dark environment. The lights will stop flashing in a bright environment. Wide Scenarios Perfect for indoor use,such as garage,attic,basement,warehouse,barn,kitchen,living room,cafe,office,etc..