Description: Just one key to control, the mug warmer will work, intelligent constant temperature 55°C, quickly heating. When you put the mug on coaster, soft touch the button, automatic heating and constant temperature working state, remove the cup from the thermostat, the heating pad will turn stop heating. Adjustable temperature: Soft touch the button will keep your coffee tea heating for 55°C constant, 65°C warmer, 75°C hot. After 8hrs, auto shut off. Keep your coffee, tea or other hot beverage warm around to 55° C. Never worry about high temperature and high oxidation, safe in use. Quality thickness glass ceramics, waterproof, heat-resistant, fire-resistant design,safe area heating. Suitable for most types of cups, ceremic mug, coffee mug, office cup, glass cup,stainless steel cup, milk bottle etc. Specification: Material:ABS and Electronic Component. Power Supply:USB Rated Power:10W Rated Current:5V 2A Heating Temperature:50°C/60°C/75°C Control Mode: Touch Control Coaster Diameter: less than 76mm Size Chart: approx.117x117x23mm/4.61x4.61x0.91inch Package Includes: 1 Piece Cup Warmer Pad with USB Cable Note: Please allow slight dimension difference due to different manual measurement.