Smart heating with automatic shutdown: coffee maker with gravity microsensor switch, you can control the temperature (131 °F/55 °C) without turning it off. Place the cup on the automatic heating area and the cup heater will start working automatically when it detects gravity. After the temperature is constant, you can take out the cup and drink. Quiet and safe: the smart coffee heater has an exquisite reinforced plate that is safe, waterproof and silent. It can be used at home or in the office without compromising work and life. The rounded edge design is elegant and beautiful, suitable for different occasions. Practically smart: simply connect the coffee heater to the power source and turn it on with the push of a button. Put the cup on top. Easy to complete. Suitable for all types of cups: whether it's a cup, glass jar, ceramic cup, stainless steel kettle, glass cup or baby bottle, it can be heated. For best results, we recommend using thin-walled, flat or slightly concave cups to ensure that every drop of water in the cup is hot to the touch. While heating, keep the lid closed for best results. Ideal gift: the smart cup heater comes with its own packaging and instructions. This desktop USB coffee heater is the perfect gift for family and friends at Christmas, Valentine's Day, Thanksgiving, and birthdays. This is an ideal gift for winter.