The Hammer Miners DC02 are so full of flaws. The DC02 do not hold their settings. The DC02 will not stay connected to WiFi. Updates and reflashing have been done. Contacting the joke of customer service who NEVER helps does not work. What to do ? Go to Reddit and ask community and its official the DC02 is junk and needs to be checked for weak soldering and bad joints. The Wifi components used provide weak signal and need to replaced. Man my advice is don’t buy from this company.