Smart Insulation COA-STER Coffee Cup Mat Heating Cup Pad OfficeFeatures:1. It is very suitable for winter use. Keep the cup warm in cold weather, non-slip, heat insulation, placemat.2. Compact and portable: being so mini and light-weight, this product does not take much space and can be easily taken away.3. The easy-to-use USB vacuum flask, just connect to a device that supports USB. Safe and, equipped with heating and USB power supply.4. Safe material: The product is made of tempered glass panel, which is safe and environmentally friendly, and children can use it with confidence.5. No , hot swap. It can keep the temperature of coffee, tea, beverage at about 50C.6.Use ordinary AC power, suitable for home and office. Keep the glass of water, tea, coffee, milk or other beverages warm.Specifications:Color: AR-MY-green, green, (optional)Material: Tempered glass panelSize: 180 x 90 x 20mmRated voltage: 5VInput: 5V = 2.1A (MIN)Rated power: 10WPackage Included:1 x COA-STERNotes:1. Please allow 0-1 inch error due to manual measurement. understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from real.