How do I know my electronic rat repeller is making sound to repel rats?

I have bought a rat repeller which I plug into and it makes sound to repel rats (which human cannot hear it at all). There is a little red light on the machine and will be on indicating the sound is being made. BUT, what if the machine is only an object with a red light but actually is not making any sound at all? Any ways to test the machine is making sound?How do I know my electronic rat repeller is making sound to repel rats?
Holy sh_t your paranoid. go get one that makes noise and go out of your mind or get a rat and ask him to have a listen.How do I know my electronic rat repeller is making sound to repel rats?
Call Foley's office and get him on the phone, then put it right up to the phone, if he squeals...it's working!
get a rat, put it near, see if it runs away.





anyway, the POINT of that is that you WON'T hear it.





Faith has a place in situations like that.
call a real estate agent to list you home. if he shows up its not working.
That is a good question. You have to just 'trust' that it's working. Exert from a website:





The DX610 has a small red LED indicator that glows when the unit is plugged in. There is also a soft pulse sound you can hear if you are close to the unit. You will also notice an absence of mice, rats.
borrow a rat and place it right next to it.
it doesn't matter since they don't work ( did you research or just read the fake testimonials - all testing by Consumer Reports and other Consumer Organizations said they were useless )