youyixik is a company with a history of more than 30 years. We take in the opinions and experiences of our customers, using advanced technology and high-quality raw materials to make professional pet products, including wireless dog fences for 1/2 dogs and smart cat litter box. Wireless dog fences has saved us! Our dog was getting out all the time, digging under fences, causing trouble with the neighbors, etc. Now we have no issues because this electric dog collar. It took probably 2 days for our dog to truly understand the boundaries but he caught on quickly. Our dog now stays within the boundaries at all times and we are happy dog owners again. I will say that set up was tricky. I wish the range could change from a circle to a square (most people’s properties are square). Set up was a bit confusing and took some trial and error and lots of walking around figuring out where to adjust the boundary but once we got it set up it has been smooth sailing. We have had it for a couple months now, we always forget to turn the collar off at night time oops but have had not had to replace battery. We wish we would have bought this a year ago when we first got our doggo.