1. Connect the USB cable to the computer or charger switch interface, coasters begin to generate heat.
2. The need for thermal insulation on the silicone cup 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 the 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.
Material: Silicone + Carbon Fiber + Electronic Components
Features: Warm Keeper, Convenient to Use, Cool Cartoon Boy Pattern
Size: 9.5cm x 0.5cm/3.74" x 0.20" (Approx.)
1 x USB Cup Warmer Mat(Cup Not Included
Due to the light and screen setting difference, the item's color may be slightly different from the pictures.
Please allow slight dimension difference due to different manual measurement.