Lentek's Indoor Pest Control systems offer a great defense against your rodent problems. Lentek offers a variety of indoor PestContro brand products that provides temporary relief from Pests, (Rats & Mice) in your home or office. Lentek's PestContro is part of your overall Pest Control Management System. Always keep plugged in to maintain temporary results. Satisfaction Guarantee. Direct Plug-In Electromagnetic Single Speaker Ultrasonics Effective temporary relief from Pests, (Rats and Mice) Built-In Night Light