can you recommend the name/brand?
The one I have is ‘defender pro’. This is how it was listed on my Amazon orders. “ Ultrasonic Pest Repeller, Pest Control Electronic Plug in Repellent Indoor for Flea, Insects, Mosquitoes, Mice, Spiders, Ants, Rats, Roaches, Bugs, Non-Toxic, Humans&Pets Safe 4 Pack
Brand: Defender Pro”
But there are many others. I bought this one back in 2020. Been working since then.