Features: 1Scope of Application: Both the charging bank and the computer charging head are available, and the household USB interface is available. 2Heating and Cooling: The coaster is fast cooling and fast heating. In summer, a cold drink can refresh you at any time. In winter, a warm brown sugar can warm your heart and nourish your stomach. 3Simple Operation: Turn complexity into simplicity, bid farewell to complexity. The cold and warm coaster can be opened easily with one button, controlled freely and switched with one button. 4Reliable Performance: High efficiency cooling coaster. Enable all day without pressure. Large exhaust holes are designed to dissipate heat quickly and prolong service life. 5Compact and Mini: The compact mini coaster is just right. It can be carried with you, and the use of the adapter is better. The heating and cooling coaster does not pick the cup. 6Applicable Scenes: Dormitory, home and office are the best choice. It's cold in summer and warm in winter. It's a good gift for family members, girlfriends and children. Specification: Item Type:CoasterProduct Material: ABSProduct Color: WhiteWeight: Approx. 520g / 18.3ozPower Supply Mode: USB Power SupplyWorking Current: 2ARefrigerating Power: 13.5WHeating Power: 9WMaximum Temperature: 118 Package List: 1 xCoaster1 x USB Cable1 x Manual1 x Adapter