I have many things to say about this. I couldn't be more happier with this i paid 200$ for one and it wasn't even half as good as this one for 30$. This one comes with many different prongs. It's easy to use and is a c charger! Makes life so much easier not having all these different cords. Comes with extra collar also. Tester to make sure it's working. Also i can take this apart and change the battery myself. I should of bought this years ago. But i thought oh no the ones at the pet store are better quality. Not true ! This one is amazing. My dog is over 100 lbs and the collar it comes with fits her. If u know how to use straps and buckles this will fit any size dog. I'm very happy with this purchase. If this only lasts a year i will gladly buy another one. My 200$ one from the pet store didnt even last a year. Great seller fast shipping!!! I highly recommend

Good quality. I'm only using the vibration mode and it's already providing instant result.

Everything works well. Signal levels and shock intensity are adjustable. I tested the shocker on myself at level 50. It feels quite strong. Haven't used it on a dog yet. Need to train with sound first.

At the moment it works perfectly, i am very satisfied... small and lightweight, it does its job... 3 activation modes: vibration, sound and shock...

Great product, the dog didn't love it but he obeys whenever i call him a few times. He uses the shock sparingly and learns very quickly. Used on a siberian husky.