How to Use Coffee Warmer Mug: 1- Place the cup on the center of the wireless charging pad will start to work when the indicator light on the bottom is on.2- Use the charger in the package or other DC 5V/2A chargers.3- Please do not use the computers USB interface for the power supply because the output power is less than 2A which will not work properly.4- If the temperature is lower or higher than 131°F / 55°C the temperature is automatically controlled at a constant temperature to prevent dry burning at high temperatures.Attention: 1- Please do not use the dishwasher to clean there is a circuit board at the bottom of the cup.2- Please do not microwave and the cup cannot be soaked in water.3- When there is no drink in the moisturizing cup move the cup away from the wireless charger.4- Please read the manual carefully before using this product then follow the steps of instructions for proper operation. SMART COFFEE MUG WARMER: This coffee cup warmer can keep the temperature of coffee and tea around 18W (131 ° F / 55 ° C). This cup warmer can also charge all your Qi-compatible phones and other devices at approximately 15W of power. WIRELESS CHARGER: This coffee cup warmer wide compatibility can charge your Samsung Galaxy S8 / S9 / S10 / Note8 / Note9 / Note10 iPhone 8 / X / 11 and all other Qi compatible devices. When your phone is fully charged the power turns off automatically when the charging feature is disabled the heat turns on and doesnt get too hot. In case of excessive power the light will flash. Power input: 12V 1.5A Charging output: 5V / 1A 9V / 1.2A 12V / 1.5A. FOR WARMER COFFEE: The mug capacity of this coffee Warmer is 350 ml Ceramic Mug Warmer has quite enough space for your tea and coffee You can keep different beverages like Coffee Tea Milk Chocolate and others warm drink and enjoy whenever you want. ( Note: This coffee cup warmer does not increase the temperature of your coffee it just keeps the temperature stable.) EASY TO USE AND SAFE: Intelligent temperature e control sensor temperature control chip overheat protection. The power is automatically turned off when the cup is lifted off the heater. Protects the battery from overcharging no fear of getting caught in electric current when water is spilled on the heater because the heater is waterproof. Do not leave items such as coins key rings etc. on the heater. BEST GIFT: This coffee cup warmer keeps your coffee warm as well as charges your smartphones. You can find both in one device this is a great thing very good for a gift. Great gift for Valentines Day Thanksgiving Christmas and other special occasions for your lover dads mothers wives husbands and all relatives to express your interest.