Feature: Small size and light weight make it easy to carry or store. It does not take up too much space. This warm coaster is made of high quality plastic material, which is evenly heated, safe and durable to use. Small size, suitable for most stainless steel cups, baby bottles, ceramic cups, glass cups, etc. The cup will automatically power off when removed from the heated cup holder, very safe. Keeps coffee, tea or other hot beverages at 55C for safe use Great for home and office use to keep hot beverages warm on cold days Specification: Name: 55 degrees heating coaster Power supply: USB power supply Power: 16W Size: 160*120*20mm/6.3*4.72*0.79in Color: White, Green Note: Cup is not included. The balance point is about 55C. Depending on the weather temperature and the thickness of the cup material and other external reasons, there are certain differences in temperature. 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. Thank you! Please allow 1-2cm measuring deviation due to manual measurement.