Save Industry SV-2256 Ultrasonic & Electromagnetic Rat Repeller, Set of 4

Repels mice using ultrasonic and electromagnetic waves. This easy-to-use mouse repellent simply plugs into an outlet. Ideal for kitchens, food processing areas, grocery stores, warehouses, and more.
It is safe for children, pets, and food as it does not emit any harmful substances.

[Approximate Size] L67 x W50 x H113mm
[Approximate Weight] 130g
[Material] ABS Resin
[PS Mark Type] Electrical Appliances Other Than Specified Electrical Appliances
[Reporting Business Operator Name] Save Industry Co., Ltd.
[Power Supply] AC100V 50/60Hz
[Rated Power Consumption] 9W Max
[Rated Current] 1A
[PSE Certified] This is an electrical appliance that complies with the technical standards of Japan's Electrical Appliance and Material Safety Law (PSE).

Selling because I no longer need it after moving. Used for several years.
I tested the operation before listing, but one of the red lights (electromagnetic wave indicator) is blinking instead of staying lit.
I am unsure of the exact cause or what this indicates.
There is some discoloration and dirt.
Please only purchase if you understand these conditions.

Thank you for your understanding that this is a used item.

Please judge the condition based on the photos.