USB Mug Heater

Descriptions: This cup pad Round diameter is 9cm, The actual working part is 3.5cm x 3cm, the temperature of the heated portion of the surface of the coaster is maintained about 50-80 degrees when it working (except the thermometer, no other things are placed on the cup pad , then get this measurement results). Material:Silicon, Electronic component: 3.5cm x 3cm Connect the USB cable to the computer or 5V charger switch interface, coasters begin to generate heat.   Please Unplug the USB cable when don't use, to extend the life of the product.   The heating effect is not obvious; recommended for keeping hot water Warm,  it will help tea or coffe slower to cool ( 200ml hot water long time keep Warm about 35-40 degrees)  Warm effect: Adapter > Power Bank > Computer  Thin glass flat bottom cup and metal flat bottom cup for better heating    Package included  1 x USB cup warmer, cups are not included Why buy from us? No Hidden Charges. Safe and Secure Payments. 100% safe and satisfactory product.