Dogtra GPS Fence - No Subscription Wireless Dog Fence with App, Waterproof Collar, Dogs 15 lbs and over

Works great for the price! So easy to set up and to make the perimeter. The first warning you can choose tone or vibration and how many meters from the first fence you want it. Then there are 2 other backup fences. The shock of the 3 fences can be adjusted to get stronger. My driveway is 3/4 mile and my one year old black lab was going to the neighbors. We did not even flag train. We have had it exactly one week and our puppy has only been in the warning zone 3 times and crossed the first fence twice within minutes about 1:15am and I believe he was chasing something. It's fantastic that when your dog comes back it doesn't shock it. Our dog has never been close to fence 2 or 3. It does need to be charged about every 48-60 hours so we just kennel our puppy for a few hours while it's charging. I know some people think it's heavy but I don't necessarily think so, our dog is about 65lbs. You have to be pretty close to the collar to sync the history but the collar is working even when your phone app is not synced.