Keep the morning coffee hot at your desk while you work, or keep a cup of hot tea steamy while you relax on the couch. Put a cup on to warm your drink Automatically; take the cup away to stop working. A Gravity sensor switch under the plate to control power on/off.  A flat-bottomed mug is required, a Metal/Glass/Ceramic Mug is suitable. Do not use it to Heat Water like a kettle! Put on the Cup Lid for Better Affection.