With so many devices on the market, it can be difficult to know which one is the best for training your dog. What devices have you found to be the most effective in teaching your dog commands and tricks? What features should you look for when choosing a device?I recently purchased a remote-controlled dog training collar, and it has been a great help in training my dog. It has a range of up to 1000 feet, so I can train him even when I'm not in the same room. It also has a vibration setting, which I find to be very useful for teaching him new commands. I'm interested to hear what other devices people have used to train their dogs, and what features they found to be the most useful.