I was pretty satisfied with the product that has been known for several months no bad software development. Unfortunately, after eight months of use, screen pixels (vertical line) no longer work. You can see it still not bad, it passes through the numbers and letters displayed on the screen and it's not very nice. Also the colored ring loses its paint at the edges over time. In short, the quality seems extraordinary to me. FYI, I had also had to change the battery. I expect a return of service of the brand ... to be continued
