It is both a coffee warmer and a phone charger.As a mug warmer, it's used ceramic wireless heating technology, better thermal conductivity, you can keep the cup of coffee, tea, milk, water and other beverages at a temperature of 100F-132F, which helps maintain good taste, suitable for all day drinking.As a wireless charger, it supports fast wireless charging up to 10W, compatible with most QI-enabled smart phones, which can save space on your desk with no need for another wireless charger.When the cup leaves the base, the power will automatically turn off.Waterproof design, easy to clean, do not worry about safety issues.It's a great gift for lovers in Valentine's Day,Thanksgiving,Christmas and other special occasions to show your care.