ABHY Wireless Dog Fence System - Adjustable Electric Pet Fence & Training Collar Remote (2023 Model) for Large & Medium Dogs | Indoor/Outdoor Use, Backyard Containment, Dog Training Solution

They work ok, sometimes if using both they can react off of each other shocking both dogs. If using on 2 dogs you have to set it for using 3 dog collars for it to work on 2 collars. You have to read the instructions very close they can be a little deceiving. Battery last a while, but I didn't keep mine on all the time. I use it them turn it off when dog's are inside. They fit pretty well, they look nice, for the money so far it's been a good product.