If you are looking for a professional and affordable USB powered drinking cup warmer, then your research is over here. That& 39;s because our product can meet your need. Adopted of premium material, it is practical and durable for long time use. It is not easy to get deformed and bring you much convenience. Features -Color:Black -Material:aluminum alloy, tempered glass -Size:8.00X8.00X1.00cm/3.14X3.14X0.39in Input: 5V 2A Power: 7W - USB powered, low power consumption, can be used in office and dormitory. - 40 Celsius degree is closed to human body temperature, comfortable to drink. - With anti-slip silicone pad, prevent the coaster from moving during use. - Small size, lightweight, portable, you can carry and use it everywhere you go. - Can be used by yourself, or as a small gift to friends and family.