This ceramic mug warmer set is perfect for keeping your coffee warm while charging your phone. It has a capacity of 12.8oz/380ml and a wall plug-in power source. The set includes a mug and is suitable for anyone looking to get through the day with a warm drink and a charged phone. The mug warmer is compatible with universal brands, and the coaster can charge any mobile phone. This versatile set is made of ceramic. It is great for use at home, in the office or even for travel. Get yours today and enjoy warm coffee and a charged phone throughout the day!