Electronic pest repellers are devices that emit high-frequency sounds or electromagnetic waves to deter pests. They are often marketed as a humane and chemical-free way to keep pests out of homes and businesses.
There is some scientific evidence to support the effectiveness of electronic pest repellers. A study published in the journal “Pest Management Science” found that ultrasonic pest repellers were effective in reducing the number of rodents in a laboratory setting. However, other studies have found that electronic pest repellers are not effective against all pests, and they may only be effective for a short period of time.