So far I have to say this collar is living up to the reviews. We love this. Most haven’t been strong enough to make either of our stubborn doggos even BLINK and this one sure gets their attention! Especially for our precocious 11 month old pup. It’s so easy to set up. I may or may not have tried to skip the instructions but...read them � I will come back as time goes by to update but so far this collar is a winner in our home ❤️