pestexpel Ultrasonic Pest Repeller Get rid of Pests Fast Best Repellent Against Rats, Mice, Rodents, Flies and Insects No to Spray,Glue & Traps Pest Control JACK HAMMER EFFECT - Pest Expel is an advanced electronic device uses cutting edge technology to emit powerful ultrasonic waves from 22 to 65 KHz of frequency and intensity too high that it sounds like a Jack Hammer to pests & insects. It consistently attacks their auditory and nervous system & forces them to leave your home. LIFETIME GUARANTEE - The only Pest Repellent backed by a Lifetime No-Hassle Free Replacement Guarantee.A lifetime guarantee only applies if it's purchased directly from American Ocean Corp on amazon. AUTO SWEEP TECHNOLOGY - Our device uses high tech automatic sweep system to change frequency of ultrasonic waves after few cycles, which creates extreme irritation to pests. The continuous change in frequency system avoids pests to get immune to sounds in comparison to fixed frequency emission technology. NO MORE BLOODY TRAPS & CHEMICALS  It naturally drives the pests & insects away from your home without a need for you to use traps and harmful chemicals around your kids. It saves you thousands of dollars in pest control services. No need to clean dead pests and insects. Just Plug in. 60-DAY MONEY BACK GUARANTEE - We are so confident in our products, that we back them with 60 days no questions asked money back guarantee. If within the first 60 days of ownership you are not satisfied with the product, you can request for a refund.