Fangrui Product Details New Upgrade 9 Tempreture Settings -- 2023 Newly Upgraded Mug Warmer With Better And Faster Heating Effect! It Has Three Cup Types Of Glass, Ceramic And Metal. You Can Choose One Of The Settings According To Your Personal Preference And The Material Of The Mug, Glass 140160180 Ceramic 130150176 Metal 145165185 1-9 Hours Timing 4 Hours Auto Shutoff -- In Order To Prevent Safety Hazards Caused By Forgetting To Close The Coffee Coaster, This Coffee Coaster Has 4 Hours Auto Shutoff And 1-9 Hours Timer Shutoff Function. Touch The + - Button To Set The Automatic Shut-off Time From 1 To 9 Hours. If You Dont Set Auto-off, It Automatically Turn Off After 4 Hours By Default. Fits Most Mugs -- 3.75 Inches Heating Area Is Suitable For Most Mugs, Such As Ceramic Mugs, Glass Mugs, Stainless Steel Mugs And Baby Bottles, Etc. The Heating Effect Be Obtained By Using Thin-walled Flat-bottomed Mugs. Sensing Function --there Is A Microgravity Sensing Button At The Bottom Of This Beverage Warm