The refurbed 42mm Samsung Galaxy Watch R815 is an upgrade from the R810 in that it also offers LTE. This means you can make calls on the go without needing your smartphone! It's ideal to take with you running or other any sport where you would ideally like to have a phone with you, but it is simply impractical. With an OLED display, you always have the time at a glance, as well as your heart rate and much more. The watch reliably measures steps or swimming strokes, can be charged wirelessly, and has an altimeter and much more on board. The case of the completely renewed Samsung Galaxy Watch R815 42mm is made of stainless steel and the display is protected by sturdy Gorilla Glass.