Automatic ON/OFF: The coffee cup heater uses a micro sensor to control the automatic switch. You only need to insert the power adapter into the base, then put the cup on the base, the heater will automatically turn on and heat up. If you want to stop heating, just lift the cup and it will be off. During this process, no buttons are needed. (Note: Please use the cup provided with us, otherwise it cannot be on.)Spill-proof Design: The leak-proof design prevents you from accidentally falling over the cup and damaging the coaster, and makes cleaning easy and simple, just wipe it with a damp cloth. (Note: Do not use the dishwasher to clean the ceramic cup. There are some special materials on the bottom of the cup that will be damaged by the dishwasher. Please wipe it with a damp cloth.)