Smart LED - Indicates when beverage has reached its perfect temperature and more. Built-In Battery - Up to 80 minutes. All day when placed on charging coaster. Auto Sleep - Intelligently senses when to turn on and off. Temperature Range - 120F to 145F (50C to 62.5C). Select your temperature with the Ember app. Ember app - Set temperature customize presets receive notifications and more. Recommend hand wash only. Dimensions: 4.6"H x 3.46"W x 4.5"L. Includes charging coaster.