I have purchased three separate collars from Patpet. I have to say thier customer service is top notch! I had to return a collar due to it not longer working and they sent me one in under three days. Things happen and I am glad they stand behind thier product.Now for this collar, I am 100% impressed. I had the old style that is rechargeable. This one takes 2 aaa for the remote and 2 aaa for the collar. Battery life is really good and there are several advantages to not having a rechargeable collar. Mainly waterproofing. The seal on the batteries is awesome. No water is getting in. The other good thing about this collar is for those that love the outdoors. You dont need to charge it and instead can bring an extra set of batteries if needed. The second thing I love about patpet collars is the metal prongs that come with the collar. I have a 85 pound german shepard and he has a thick coat. The included metal prongs help get under the fur to deliver the shock if needed. There is also two sets of little metal nubs for different size dogs and two sets of silicone tips that cover them for the comfort of your pet.The vibration on the collar is outstanding! I have purchased several different collars from and this is by far the strongest vibration. I do not like to use shock as much as possible and having this strong vibration to correct my dog is wonderful. It alerts him instantly.The sound is clear and crisp. It gives a nice high frequency beeping and my dog responds very well to it. I use it frequently for training.The range on this collar is pretty good. Patpet says up to 1000 feet, but I have only tested under 100 feet, but the collar works great. I taught my dog a sit stay and a down stay using just vibration or noise from this collar. The remote also will buzz with a single press. Most remotes have to be pushed twice, once to wake, second to buzz, but this is instantaneous.The build quality is also too notch. I would have expected to pay upward of $50 for this collar at the store. At $24.99 it's a steal. Plus there was a coupon that brought it down to $19.99.The only con to this collar is the nylon collar. I perfer to have a plastic collar as seen on other brands for durability. However, I have not had any durability issues and this is just my personal preference.Overall, I highly recommend!