Sonic rodent repellent

This is called the Victor PestChaser.

Model: m750k (3 available)

Here's notes according to their website:

• Plug-in device humanely repels mice and rats
• Protects average-size rooms such as living rooms, bedrooms, and kitchen
• Emits a high-frequency sound to drive away rodents
• Safe for use around people and non-rodent pets when used as directed
• Convenient nightlight feature provides soft illumination