USB Mug Heating Warmer Coaster

USB Cable Heating Coaster is made of PVC, sized 3 3/4” Diameter,1/4” thickness, with a 50-inch long wire made of ABS.USB Mug Warmer Coaster is powered by the USB cable connecting with the computer or adapters. It’s an ideal warmer to keep the cup and mug warm for a long time. It’s an item that people will keep on the desk long time in winter, 3.75 volt/ 750 MA. Customized one-color imprint can be printed on the PVC coaster for brand exposure.