Desktop USB Heated Coffee/Tea Mug Warmer, Candle & Wax Warmer USB powered, no batteries required, easy to tote and take anywhere Use for coffee, tea, hot cocoa & more, Surface easily wipes clean Keep beverage, On/Off switch controls warmer; red LED indicates when warmer is on, the plate get hot in 5 seconds The Coffee or tea warm at 113- 122 Fahrenheit (45-50 degrees C) Measure: 4.72" Diameter x 1.3" H; Heating Surface Area: 2.75" Diameter; Cord Approx 50"