Just place the teacup or coffee cup that needs to be heated on the coaster and then plug line head in to a USB outlet and it will start to work to the temperature you want with the USB port.
- Made of PVC
- USB line length: 1.3 m
- USB plug can be connected to the computer, charger, charging treasure
- Keep your cup warm for a long time
- Large print area
Suitable for most water cups, milk cups, coffee cups, long lasting warmth in the cold winter.
