My DIY test: I stood 3 feet away and asked a friend with good hearing, she said she heard faint squeaking. I heard nada. Shows it’s all subjective.
Thanos Home official resource note
For readers comparing indoor rodent devices, our UR02S Indoor Ultrasonic Pest Repeller page explains the operating modes and placement guidance. Do not assume that every ultrasonic device is completely silent, or that hearing a sound proves it is controlling rodents. Model specifications and the room setup matter.
For more context, see Can humans hear ultrasonic pest repellers? and our mouse treatment knowledge base. A device should not replace entry-point sealing, food-source removal or appropriate trapping.
This is an official Thanos Home product-resource update, not a customer review.