Review on ANTEDEA Invisible Dog Fence: Advanced Bluetooth 2.4GHz Technology, 100% Waterproof & Rechargeable - 100 Adjustable Levels by Lori Okuno

This thing was difficult to install and the wire broke within a week. To make matters worse, my dog got so scared when he was electrocuted that he went and hid, not knowing that if I couldn't reach him I couldn't turn him off. So she let it shock her again and again. It was terrible. We tried everything we could think of to make her understand, and as soon as they get too far from the receiver, it stops picking up the signal. So if you don't turn it off when the dog returns to the marked area, it may shock. You should have made sure it's on the border before turning it on. It's also worth mentioning that the settings in the main window are very annoying and not what they show at all. Literally zoom adjustment and power button. No way to control the force of the impact and the proximity setting is terrible because if you try to pick the dog up or take it out if you're not careful you could be electrocuted if you don't take it out quickly enough. The essence is easy to break and painful to build up, so not worth it.