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The Bell+Howell Ultrasonic Pest Repeller is a plug-in device that emits high-frequency sound and a soft pulsing LED glow. It is sold as a set of four, one per room, and is marketed as a non-toxic alternative to traps and sprays for mice, ants, roaches and spiders. The appeal is chemical-free, silent-to-humans operation and built-in night lighting. The catch is that ultrasonic repellents have weak and inconsistent evidence behind them, and owner ratings are middling, so treat it as a supplement rather than a cure.
In stockSold by Realco DirectReturns: Sold by a Walmart Marketplace seller; returns go to the seller under the seller's returns policy.
Ratings are mixed at 3.9 out of 5. Some owners report fewer mice and roaches after plugging units in, while others saw no change and a few noticed a faint whine.
This set includes four plug-in ultrasonic pest repellers. Each unit sends out ultrasonic sound waves that people and pets can't hear but that irritate pests. It is meant to drive away mice, ants, roaches, spiders and other pests.
Each repeller emits a soft, pulsing LED light, so it also works as a night light. The devices are non-toxic and use no traps or chemicals.
To use one, plug it into an outlet in a room. Each repeller covers a single room, so place one in each area you want to protect. It runs around the clock.
