Ember Travel Mug 2 Plus Temperature Control 12 Oz 355 ML Black UK Plug PS4 LONG BATTERY:  Ember Mug High Touch Sensitivity LONG BATTERY:  Ember Mug 2 smart coffee mug has extended battery life that keeps your drink at your preferred temperature (between 49°C 63°C) for up to 90 minutes on a full charge or all day on its redesigned charging coaster the Ledger Flex case is lightweight and slim to make carrying around easy and discreet which helps pinpoint the mug's exact location if misplaced and can also notify you if your mug has been left behind The self heating coffee mug is also functional without the app and remembers your last used temperature (57° C or 135° F out of box)