Description: 【Durable Material】: This hot coaster is made of high quality materials. PTC heats up quickly. It can quickly heat milk cups to 70°C in 20 minutes. It is highly compatible and does not need to . 【Intelligent Timing】: Smart cup warmer,55 C intelligent constant temperature, two speed automatic shutdown/4h timing/12h timing design, you don’t have to worry about forgetting to turn it off. 【Portable】: Our smart coffee warmer is small in size and Light weight, easy to carry and only takes up little space. 【Key Switch】: The drinks cup warmer features technology, an LED display and a waterproof panel. Just tap to turn on the cup heater. 【Application】: This USB cup warmer is suitable for all kinds of flat bottomed cups, such as ceramic cups, glass cups, metal cups, etc. Size Chart: Warmer Coaster:11.5cmx15cmx2cm/4.53inchx5.91inchx0.79inch Package Includes: 1 Cup Warmer 1 Cable(3 Pack) Note: Please allow 1-3mm measuring deviation due to manual measurement. Due to the different monitor and light effect,the actual color of the item might be slightly different from the color showed on the pictures.