"Awesome, no more mice, better than the 600/year pest guy for 4 years that didn't work, better than poison that they just keep coming back, awesome...needed two to cover the basement entries, working great for 3 winter months so far, doesn't bother cat or dog."Does Ultrasonic Pest Control Work On Fleas On Humans Bell & Howell 4-Pack Ultrasonic Pest Repellers: Fast and effective against mice, rats, ants, roaches and spiders Ultrasonic sound waves combined with electromagnetic waves No harmful chemicals Odor-free Plastic 90-day limited warranty Model# 33153916 Directions: Instructions: Fast and effective, Bell & Howell's Ultrasonic Pest Repellers just plug into an outlet and use sound waves to keep mice, rats, roaches, spiders, and ants away Explore this item Features New Assembled Product Weight Manufacturer Insect & Pest Repellent Type Country of Origin - Components Units Per Consumer Unit Pest Type Manufacturer Part Number Model Brand Country of Origin - Assembly Assembled Product Dimensions (L x W x H) You are viewing Bell & Howell 4-Pack Ultrasonic Pest Repellers N 0.12 Generic Ultrasonic Pest Repellers Imported 1 Insect 50167 50167 Bell and Howell Imported 3.0 x 2.0 x 2.7 Inches Sunforce Solar-Powered Garden Rodent Repeller N 1.5 SunForce N/A Imported 1 Gophers, Rats, Moles and other Rodents 80001 80001 Sunforce Imported 14.5 x 6.5 x 3.8 Inches Ortho Home Defense MAX Insect Killer for Indoor & Perimeter1 Ready-To-Use Trigger 1 gal N 8.33 lb The ORTHO Group Insect & Mosquito USA 1 Ants 0196710PM 0196710PM Ortho USA 4.875 x 8.95 x 12 Inches BiteShield Portable Mosquito Repellent N 0.55 Koolatron N/A USA or Imported N/A Mosquitoes MM30 MM30 Bite Shield USA or Imported 3.1 x 2.5 x 3.0 Inches Raid Concentrated Deep Reach Fogger, 4 ct N 0.9 lb SC Johnson & Sons Ant;Spider USA and Imported 1 Ant;Spider 657396 1351705 Raid US 2.13 x 8.5 x 4.25 Inches Bell & Howell Electromagnetic Ultrasonic Pest Repeller N 0.12 Generic Pest Repeller Imported N/A Rat 50153 50153 Bell and Howell Imported 3.0 x 2.0 x 2.7 Inches Viatek PR60C Ultrasonic Pest Repeller with Electromagnetic Nightlight N 0.4063 Viatek Pest Repellent Imported 1 Flea;Cockroach PR60C PR60C Viatek Imported 5.25 x 3.0 x 3.0 Inches Bird-X Yard Gard Ultrasonic Animal Repeller N 3.0 Generic Animal Repellent Imported 1 Animal YG YG Generic Imported 6.75 x 5.25 x 3.25 Inches Bug Zapper Electronic Flying Insect Killer N 2.0 Koolatron N/A USA or Imported N/A Mosquitoes FT24 FT24 Generic USA or Imported 5.3 x 5.3 x 13.0 Inches Best seller ranking:#102 inPatio & Garden #14 inPatio & Garden Gardening & Lawn Care #2 inPatio & Garden Gardening & Lawn CarePest Control Advertisement Advertiser Content Explore Related Products Skip to end of links Bell + Howell Pest Control Bird Repellents Control Pest Whiteflies Insect Control Killer Pest Control Bell + Howell Bell + Howell Collection Advertisement Advertiser Content Sponsored Products Skip to end of links $4.94 SC Johnson Off! Mosquito Lamp Starter Kit 0.029… Average rating:3.5263out of5stars, based onreviews19ratings 2-Day Shipping $7.48 Raid Concentrated Deep Reach Fogger, 4 ct Average rating:3.0309out of5stars, based onreviews97ratings $8.98 Raid Max Bed Bug & Flea Killer, 17.5 oz Average rating:3.1892out of5stars, based onreviews74ratings 2-Day Shipping Advertiser Content Customer Q&A Get specific details about this product from customers who own it. Further Information FTC Warns About Ultrasonic Pest-Control Devices (ftc.gov) Ultrasound and Arthropod Pest Control (Kansas State University) See All You May Also Like: Danny Lipford outside house with perimeter insecticide. I purchased at a big box retailer.