Bell+Howell Ultrasonic Pest Repeller 4 Pk

Four-pack ultrasonic pest repeller

The Bell+Howell ultrasonic pest repeller comes in a four-pack designed for indoor use in homes and offices. Each unit plugs directly into a standard wall outlet and emits ultrasonic frequencies intended to deter mice, rats, spiders, ants and roaches. The devices contain no chemicals and produce no odour, making them suitable for households with children and pets. They offer a non-lethal alternative to traps and exterminator services.

Variable-frequency operation under continuous use

The repellers use intelligent variable technology that constantly changes the ultrasonic wavelength to prevent pests from becoming immune to the sound. Because the frequencies are undetectable by humans, the units run silently during sustained operation. No refills, cartridges or routine maintenance are required, so performance remains consistent as long as the devices stay plugged in. Coverage is limited to the room in which each unit is installed.

Plug-in installation with outlet constraints

Installation consists of inserting each unit into an available mains socket; no wiring, mounting hardware or configuration steps are needed. The compact 2.7 by 3 by 2.7 inch housing fits most outlets, though it may block the adjacent receptacle on a double socket. Units must remain unobstructed by furniture or curtains for the ultrasonic waves to disperse effectively. The pack includes four identical devices identified by manufacturer part number 50121.