Tea Coffee USB Cup Mug Warmer

• Portable, you can carry it in your handbag or pocket.
• Keep your tea/coffee warm effortlessly.
• Adopted from latest technological innovations.
• You can connect it to any USB port. laptop, desktop, usb adapter, usb car charger. 

SpecificationMaterial: Silicone+Carbon fiberSize: 9 x 0.6cmPower: 3.75WVoltage: DC 5VCurrent: 750MA Usage instructions1.Connect the USB cable to the computer or 5V charger switch interface, coasters begin to generate heat.2.The need for thermal insulation on the silica glass coasters, then it can play the role of insulation (please don't use the recessed bottom cup, glass Cup is best)3. Please do not use this insulation Cup for outside functions.4. Please Unplug the USB cable when don't use, to extend the life of the product.5. It is only used to keep your tea or coffee warm, but not for heating. Package includes1 x USB cup warmer(USB pad only, cups are not included)