Review on 🐶 JSCLYAN Waterproof Dog Training Collar: Rechargeable Shock Collar for Medium & Large Dogs, 1600ft Range - Beep, Vibration, Shock Modes - Keypad Lock, Support for Training 3 Dogs by Natalie Adams

This is a great trainer. They have 3 levels of "correction" one of which is just a beep which is quite loud and can be heard from quite a distance to let you know it is working. Secondly, this is the vibration of the entire collar, which does not harm the dog at all, but attracts its attention (perhaps comparable to the vibration of a smartphone). And third, the actual shock is through small electrical contacts that can be set from 1 to 99. I tried it on my arm at level 15, and while I wouldn't call it entirely comfortable, it wasn't very painful or would harm your dog. It worked AMAZING well for our two dogs and we saw a virtual change overnight. We literally only had to 'electrify' each dog ONCE. After that, they'll hear a beep and then feel a vibration and come running, long before we even have to think about electrocuting them again. Use the electronic collar correctly. You do NOT want to use it randomly, and you do NOT want to use it to "punish" your dog. This is meant to grab their attention, distract them from what they are focusing on and bring their attention back to YOU. Start with a beep, then move on to vibration, and finally, as a last resort, shock. Much better. It's rechargeable (a major brand had specialized batteries that were expensive and required frequent replacement) and it lasts for days on a charge. Plus, the big box had a soft beep, so it was hard to tell if it was actually working or not, and it also had an automatic shutoff after a certain amount of time - but you had no way of knowing it was off, which was when you went for a walk with the dog was quite uncomfortable. This device solves all these problems and the price is acceptable.