Roaches can become health hazards in your home, especially if they invade the kitchen or bedrooms. Chemicals often are used to eliminate roaches, but these poisons can sicken small children and pets if accidentally ingested. Fortunately, there are plenty of chemical-free solutions that don't require anything more than an electrical outlet. Most of them use ultrasonic noises, which force small rodents and insects to leave the house. These are not for use in homes where rats, gerbils, mice, or other small rodents are kept as pets.
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The Transonic Pro Ultrasonic Pest Repeller drives rodents and other pests out of the home by using sounds undetectable by larger mammals. The Transonic Pro is 6 inches by 3 inches by 3 inches. The Transonic Pro also works on roaches and most types of other insects. The Transonic Pro costs $95, which makes it a big investment for this type of equipment. However, it's one of the larger electrical units, which may make it worth the money.
The Riddex Pulse offers ultrasonic protection from small rodents and most insect pests. It comes with an LED indicator light and a nightlight. One unit is enough to clear out a floor of an average home (or, in the case of a smaller one-level house, the whole home). The Riddex Pulse comes with a 30-day guarantee and promises no carcasses will be left behind to clean up. This device costs $29.95, before shipping or taxes.
Emerson Electronic Pest Repeller
Working off the same ultrasonic principle as the Riddex Pulse and the Transonic Pro, the Emerson Electronic Pest Repeller plugs into a wall socket. The Emerson device looks like computer speakers, and has LED indicator lights. It is available in packages of three for $30.
Bell + Howell Ultrasonic Pest Repeller
The Bell + Howell Ultrasonic Pest Repeller plugs directly into a wall outlet. However, the Bell + Howell is unique because it has an outlet on its body, so you can plug another electrical device into it. The Bell + Howell is available in packs of one, two, three, and six. The six-pack, at $37.99, is the best cost per unit. One sells for $7.99 and two sell for $14.99, which makes this one of the least expensive ultrasonic pest products available.