Features: brand new and high quality With for smart reminder to drink water function, remind once every hour after opening. Three levels of temperature are adjustable, which can be set to 70°C, 90°C, and 110°C respectively (the temperature refers to the highest temperature in the center of the panel, and does not represent the temperature of the heated object). The for palm size is easy to carry. Quiet operation, does not disturb work and study. Automatic power-off function, no need to worry even if you forget to shut down, it can automatically cut off the power. Suitable for heating plastic cups, stainless steel, glass, ceramics, enamel cups and other materials. It can be used by plugging in the adapter/plugging into the computer/plugging into the mobile power supply. It is recommended to use the 5V-2A adapter or socket to achieve better heat preservation. Specifications: Material: ABS+Glass Size: Approx. 118x132mm/4.65x5.2inch Rated Power: 10W Rated Input: 5V-2A Package Includes: 1x Heating Coaster note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.