Overview: Keep coffee/tea/drink warm at 50-60oC Easy installation no driver required, plug amp; play Rated power:2.5W-5V DC. On/off switch Red LED indication when warmer is turned on. Quality insulation material around the metal hot plate prevents burns.USB powered, no batteries needed. Specification: Weight Approx:86.3g Size Approx:10.5 x 9.4 x 2.1