Since purchasing these training collars, my dogs have totally started listening.. Before they were entirely out of control and would not listen to anything at all. In just two days of using only the beep function of the collar with the vibration then and again, they get it and they listen now. It is not a 100% improvement yet but I understand it takes time, patience and lots of attention from me as well. I am so thrilled to find these collars. They have made my life better, the lives of those living with me better and have also imrpovrf ythe lives of my dogs as well. I have very rarely needed to shock with them. It seems verbal commands and patience works better with just the beep or vibrate than the shock does. With the amount of progress thus far in 3 months they will be totally obedient dogs. I cannot say enough about these collars/. Also the fact they are rechargeable. as are the remotes. mo stressing buying any batteries which itself is expensive. Excellent product. I highly recommend these collars for sure to anyone amd everyone!!!