Specifications: (GLASS CUPS WORK THE BEST)
1.Material: Silicone+Carbon fiber
2.Size: 9.5x0.6cm( 3 3/4" x 2 1/3 " )
4.Voltage: DC 5V
1.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 warmer for outdoor 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 beverage tea or coffee warm, but not for heating.
1 x USB cup warmer (NO RETAIL PACKAGE--SOLD IN BULK)
COFFEE CUP NOT INCLUDED