Designed for home or office, the new Ember Mug2 does more than simply keep your coffee hot. It allows you to set an exact drinking temperature, so your coffee is never too hot, or too cold. Smart LED indicates when beverage has reached its perfect temperature and more. Select your temperature range as 120degreeF - 145degreeF (50degreeC - 62.5 degreeC) on the mug or with the Ember app. Built-in Auto-Sleep function intelligently senses when to turn on and off. Ember then maintains your chosen temperature for up to 1.5 hours with the Ember Mug2 10 oz when off the charging coaster. If you are keeping your beverage hot while using the coaster, it can maintain your perfect temperature all day! Ember Mug2 is safe to hand wash and submersible up to 1 meter in water. Compatible for Apple devices...