KUWAN Desktop Electric Coffee Mug Warmer Plate Sleek Profile with High/Low Button Keep Beverages Warm (Brown) Modern Design: it is a very sleek design, and there are two colors you can choose: Coffee and Red. This gorgeous warmer is going to be fantastic for your desk Easy to Operate: just plug into an outlet, and one button to turn it off on the right and one of the left to turn on high or low Portable and Lightweight: its light weight and dimension make it convenient to take anywhere HIGH/LOW controls the heat: it can keep your beverage/coffee/milk/tea warm, High: about 42; Low: about 38 Notice: Its function is keeping your coffee/tea/beverage/milk warm, not heating up. And it is just for flat cups