[2018 UPGRADED] Ultrasonic Pest Repeller Plug in Pest Control - Electrical Mice and Bug Repellent - Ant Repellent for Mosquito, Rat, Flea, Fly, Roach, Spider- No more Trap & Spray(6 PACK)

Haven't done a test to see just how effective they are, but I have heard they work well.They sure don't hurt anything.

The products were delivered quickly and with good package protection. The design looks great. We have been using them for almost two weeks, seems good. I haven't seen spiders or fruit flies which we had that before. Will keep monitoring it.

Been using them for a couple days and they seem to work. Saw a few bugs before but none after I put them in.

Love these. Have not seen signs of mice or ants since I bought these.

this one did and I was glad for that. Very easy to use over and over again. I would suggest this product to anyone

Perfect for my commutes into the city and at work. this is much useful than I thought!!!! This is amazing!!! Also, the design of it was super simple and neat!!

This product keeps mice away.

It wasn’t what I expected