VAlinks Desktop USB Electric Heat Insulation Plate Coffee Warmer Tea Mug Warmer Beverage Warmer with Light Indicator and ON/OFF Switch for Indoor & Outdoor Household Office Camping According to the thickness and materials of your cup, the heating time is different, please choose the thin and flat-bottom cup to warm your drink. Convenient: Power supply by USB plug or adapter, with 1m USB cable enough for almost anywhere use. (For better heating efficiency, please use it with a wall charger.) High quality: Adopt stainless steel materials in the heating place, easy to wipes clean. Note: Do not touch the electric fever panel when the USB warmer works to prevent scalding. Easy to use: With On/Off switch controls warmer; blue LED indicates warmer is on; red LED indicates warmer is off . Widely used: Use for coffee, tea, hot cocoa & any other beverage need to warm in household, office or outdoor activities.