Perfect Temperature Everytime, Ember Mug 2 offers up to 90 minutes of heat (120°F to 145°F) or all-day warmth on its charging coaster. Ideal for keeping drinks at the perfect temperature! Makes it perfect for desk use or as a thoughtful gift! Use the Ember app to set precise temperatures and get notifications. Without the app, the mug defaults to 135°F and remembers the last setting for a consistent experience. The mug wakes up when hot liquid is poured and goes to sleep based on motion detection. Features like auto sleep and memory ensure your drink is always at the right temperature. Ember Mug 2 is hand wash only with a scratch-resistant coating and fully submersible up to 1 meter, it's easy to clean and perfect for any hot drink. Do not place in the dishwasher. Smart LED indicator lights up to show when your drink is at the perfect temperature, making it easy to know when your beverage is ready to enjoy!