Come and see our amazing products. Coffee mug warmer has built-in smart thermostat control chip, can keep the water temperature around 40-60.On/off one-button control, easy to operate, when the heater starts, there is a red LED light to indicate.Standard USB1.1 4-port HUB connector, supporting full-speed 12Mb/sec and low-speed 1.5Mb/sec rate. Connect USB devices up to 127Mbps, separate current overload protection interface. Each interface can provide up to 500MA current, enough for different devices.Coffee mug warmer use aluminum alloy material, which is esturdy, durable, lightweigh, safe and easy to clean. This is a gift that brings warmth, Suitable for lover, dad, mom and all your loved ones on special days. Pls confirm with us about the packing info, stock color and exact production time before placing your order.