Features 1. USB Powered And Portable: This electric coffee cup heater has a USB port, making it easy to use. 2. Suitable For Various Cups: This electric coffee cup heater is suitable for ceramic cups and glass cups. It is recommended to use cups with lids, thin walls, and flat bottoms for optimal insulation. Don't worry about occasional spills, it's effortless to clean. 3. Constant Temperature Of 55-65 : This electric coffee cup heater is equipped with a gravity sensing switch and an on/off display, making it simple and convenient to use. The electric coffee cup heater heats at a constant temperature of 55-65 , which is the ideal operating temperature. 4. Widely Applicable: This warm coaster can be combined with cups and is suitable for heating coffee, tea, milk, hot cocoa, soy milk, etc. It brings warmth to the cold winter. And it's very suitable for sharing with friends. 5. Ideal Gift: This USB coaster features a minimalist wood grain design, which is very beautiful. It is an ideal gift for friends, family, or loved ones on Valentine's Day, Thanksgiving, Christmas, New Year, birthdays, Mother's Day, Father's Day, and more. Specification Material: Wood Color: Maple grain Size: 15 x 12 x 3 cm Weight: 120 g Package Include: 1x USB Cup Warmer