ASPECTEK Includes AC Adapter, Extension Cord Pest Repeller Yard Sentinel 2 Pack Outdoor Ultrasonic Animal Control, Green, Sound Frequency:15 kHz -18 kHz

Partially effective on some animals. Adaptor provided is of poor quality.

these work well

I love the Yard Sentinel for all the cats that the neighbors let run wild in our neighborhood. It took about 2 weeks for all the cats to get the message to stay clear of my property. What was the most fun was watching the cats on my outdoor security cams about 3:00 am take their normal path through my property, until they ran into the yard sentinel, they couldn't get turned around and off my property fast enough. Now the cats don't even try to come on my property, they now walk all the way around and just look at my property, and still go to my neighbors on each side of me. I have mine set for night time only, and on sonic so I can hear it too, that way I know it's working. I love the the 30' A/C power cable that comes with it, so you don't have to worry about changing batteries, it works fine on either, you can also order a 65' power cable if you need one from Aspectek. Do not waste your money or time on the solar type, one cost as much as 2 of these type, and if you have several cloudy days they won't recharge or work at all. Now for the things I dislike. I don't like having to take the back cover off to do any adjusting of the unit when you are trying to get it set up, the alarm is screaming the whole time you are trying to get it back on, the hard plastic cover is really hard to get back on, also one of my units seems to be false triggering a lot when it rains, the other one does not. Update on my previous post. I have now been using my 2 Yard Sentinels for 7 months, and am having trouble with both, both will sometimes have loud volume, and then no volume, but the red light does come on, 1 of my units has now stop working on the electric power supply that comes with it, and will now only work on batteries

Received the product on September 29, read the instructions and tips, etc. and did all that for 6 days and 5 nights. Cats & Dogs didn't slow down pissing on lawn, Squirrels had more parties with squirrel friends digging in my lawn, Single Raccoon left and brung back 2 more raccoons and went to neighbors yard and brung the neighbors dog toy to my yard before moving on. Skunks moved in slow motion as they normally do. My point is, product features work, but doesn't repell or slow down or deter the animals that i mention which come thru our neighborhood day in and day out. DON'T WASTE YOUR MONEY

Tried to get rid of pigeons but to no avail. They never moved. I tried all different settings and still no luck. To me, this was a total waste of money!