As we mentioned before USB Cup Warmer with Hub is a device that doesn’t require any driver installation as it is a plug & play device. Hence we will skip the installation process since it doesn’t have one. First of all, we will test out its warmer/heater feature which is the main objective for purchasing this device. Before that user needs to look for a suitable cup; of course a good conductive cup likes aluminum or steel. We have a hard time to hunt for a suitable cup as the size that can be supported by this device is very limited but we still managed to get one at the end.
The heater will be start working once the USB cable is plugged and the switch is turned on; red LED will be lighted up. Around 2-3 minutes the surface of the USB Cup Warmer with Hub is starting to generate some heat and we have placed the aluminum cup on top of it with a cup of plain water (ambient temperature). The plain water became a bit warm after around 10 minutes and it was maintained at that level. It is a bit disappointing because it is not up to our expectation yet. However we believe that its performance will be better if it is used in non air-cond environment and use a cup with flat bottom base so that the heat will be transferred to the cup more effectively.
Besides the heater feature, we have included some basic USB performance of this USB Cup Warmer with Hub although the USB hub is an additional feature of this device; green light will be lighted up.

Conclusion
USB Cup Warmer is a creative device which allows user to keep his/her coffee/tea/drink without having hard time to keep on refilling with hot/warm drink. The heater is a bit underpowered where it is just able to keep the water slightly warm; the room for improvement is still there. For those are interest to get this device, we will suggest you get a unit which comes along with the cup since the cup is validated to achieve the expected result and besides that it will save the time to look for a suitable cup.










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