SAVE with SET of 3 Single Speaker Ultrasonic Electronic Rodent Repeller. Innovative Technology Rodent Repeller Set of 3 are registered for sale under the Pest Control Products Act by Health Canada. Canada is the only nation with a registration requirement for this type of product. Registration is ONLY granted after a manufacturer has executed rigorous and expensive field testing that demonstrates the claimed efficacy for the product. That registration is your assurance that this product will do what we say it will do-repel rodents. Be wary of products that claim to repel all kinds of pests and insects. If it sounds too good to be true, it is. Innovative Technology's 3-Pack Single Speaker Rodent Repellers represent the highest quality high output devices which are specifically designed to repel rats & mice, the most common indoor rodent pest problem encountered by consumers worldwide. Rats and mice pose serious health risks, and traps and poisons come with a heavy price. Poisons can endanger children and pets while inhumane traps require the handling of potentially disease-bearing rodents. Neither poisons nor traps provide long-term protection since more rodents will likely replace the ones you've killed. It can be an unending cycle. Our ultrasonic Rodent Repeller puts the emphasis on non-toxic prevention, instead of after-the-fact toxic intervention. Ultrasonic rodent repellers emit high frequency ultrasound waves between 32 and 62 kHz to create an acoustically hostile environment that repels rodents from sound-protected areas, over the long term. Ultrasound is kinder than traps, safer than poisons, and inaudible to people and non-rodent pets. For complete details about non toxic rodent control and proper application visit Sonic Technology's website. Instructions included. Go Green and Make an Impact!