Ultrasonic Pest Repeller [4 Pack] Electronic Plug Indoor Repellent Pest Reject for Mice,Spiders, Insects, Bugs, Ants, Mosquitos, Rats, Roaches, Rodents - Ultrasonic Pest Control [2018 NEW UPGRADED]

The instructions say to mount these 80 to 120 cm from the floor and vertical to the floor when plugged in. Only the outlets in my kitchen and bathroom are that high. But those aren't the rooms where I wanted to place these. So, they're basically useless to me. Perhaps this info is listed on the Amazon purchasing page and I missed it. Oh well.I use one in the kitchen when I'm not using those outlets for other things. Whether or not it works I have no idea. The red light is on, though.The instructions (at least partially written by someone who is not a native English speaker and with virtually no understanding of grammar or usage) are at points either unintentionally hilarious or unintelligible, though the writer must have researched some words to make sure they were at least spelled (if not used) correctly. Here is how they read:Features:Nno-toxic, environment-friendlySare and dorless22-65 KHz of repellingultrasonic frequency80-120sqm of protectionFrequency ranges:22-65KHzPower source:AC 90V-250V 50-60 HzPower: 5-6WInstructions:1. This machine should be installed at80-120centimeter away from the floor. And should bevertica l to the floor and plug to the power socket2. The installing point should be avoided from carpet, curtain etc attaching sound material.Or else, the decrease of the sound pressure will do harm on the helminthes effect.3. It's normal that the mouse and vermin will increase at the beginning of using days.Because they will get away from their living place after the attack of the ultrasonic.4. This machine can be plug directly to AC 220V (or 110v) power socket. (Power range: Ac90V-250V. Frequency: 50Hz-60Hz)5. Caution: moisture proof, waterproof6. Don't clean the machine by strong impregnant, water or damp cloth. Use dry and soft clothwith some neuter wash to clean the machine.7. Don't drop the machine and make strong striking on it.8. Using the environment temperature: 0-40*C9. To increase the effect, you should use several sets machine at the warehouse or goodspile-up, several rooms.

Works for a week, now the roaches are back and they're dancing to the ultrasound

No sirve.laa cucarachas siguen como si nada.

But it only works on big roaches (not on small ones). Here in the Summer flying roaches are common, and since I bought this product I haven't seen them anymore. The one or two times I did since I bought this product -months ago- they acted pretty confused and went to hide out. (My guess is that the product works on relatively large insects only because smaller insects are clearly not affected by the sound waves it emits).

I would give it 0 if possible. We have a mouse getting into things in our daughters bedroom. We cleaned up everything and then plugged this into the wall near the furniture where the mouse had been seen before. The next day, with this in the wall, we saw the mouse go behind the furniture no more than 4 inches from this device. We have left them plugged in, hoping they might help but so far we are still killing them the old way with traps.

Not what I expected, it has good reviews but did not work for me. Ants just passed by it.

It does not work.... don’t waste your money on this.

Flys and bugs play this product