ultrasonic pest repeller bell and howell

They are plug-in electric devices (no batteries). Product listings describe simple plug-in installation and continuous 24/7 ultrasonic operation intended to repel pests.

Listings describe these units for indoor use in bedrooms, kitchens, hallways, basements, attics, living rooms and other indoor spaces such as garages, offices, apartments, dorms and storage areas.

Many listings note a built-in LED or soft pulsing light to indicate the unit is active. Some models also include a built-in extra AC outlet (outlet pass-through) so you don’t lose plug access while the device is in use.

Listings offer multiple pack sizes, commonly 2‑pack, 3‑pack, 4‑pack and 6‑pack options to allow room-by-room coverage.

Some units include extras such as a built-in extra AC outlet (outlet pass-through), a soft night light or pulsing indicator light, and compact/micro designs intended for countertops or tight spaces in certain multi-unit kits.

Minimal maintenance: units operate continuously with no refills, traps or cleanup and no batteries are needed, so upkeep is generally limited to keeping the device plugged in.