Bell+HowellBell and Howell Ultrasonic Pest Repellers with Extra Outlet - 3 Pack

My car parked in my garage has had wires chewed by mice/rats. Will this keep them away? Can I use an extension cord to put the device right on the h

Does these ultra sonic devices work on mice

do these work with termites?

Would I be able to cancel the pest service that comes every month or should I still keep them?