Ultrasonic pest repellers would seem to fit that bill. They don’t use chemicals so cause no harm to the planet, and they don’t require that any insect be killed or maimed.

I didn’t know if these ultrasonic pest repellers were legit, but the single reason why we opted to use them was because they reportedly don’t interfere with house pets — like our two cats.

Rodents: Ultrasonic pest repellents are useful when trying to get rid of mice and rats. The key when targeting rodents is ...

On average, an ultrasonic pest repeller lasts from three to five years. You know that it's working if the LED light on the device is lit. You can buy a six-pack of these devices for less than $30.

Ultrasonic pest repellers offer a fuss-free way of killing or driving away a variety of household pests. If you don't have one yet, you can grab a 2-pack on sale for 65% off.

Get two ultrasonic pest repellers to get rid of mice, mosquitos, cockroaches and more for just $20 in the Mashable Shop — no chemicals needed.

The Ultrasonic Pest Repeller targets a variety of pests, including mosquitoes, ants and rats, using electromagnetic and ultrasonic sound waves that only pests can hear. The device doesn’t use any ...

The Ultrasonic 360° Plug-in Pest Repeller uses a sound humans can't hear to frighten away bugs and rodents in a 50-meter area around your home, and you can get 2 for $20.