5V Mug Coffee Cup Warmer, USB, with 3 Temperatures, Drinking Reminder, for Mugs, Glass, Milk 1.Mini Heater: This coffee cup heater has 3 adjustable temperatures. You can choose your favourite heating temperature (the actual temperature depends on the environment and the object being heated). 2. Reminder to Drink: Keep the power on, the 1 hour light-up reminder to drink water function works automatically, the reminder can work without WiFi or smartphone. No setup required, easy to use 3.Safety Mug Warmer: The coffee mug warmer has an automatic shut-off function that lasts up to 8 hours. High temperature resistant glass panel conducts heat evenly and is easy to clean. 4. Multi-functional compatibility: The coffee mug warmer is suitable for many different materials of mugs, glass mugs, stainless steel mugs, ceramic mugs, milk jugs, coffee pots and so on. In addition, the tea warmer is suitable for heating coffee, milk, candles and so on. 5.Thoughtful Gift: You can choose our mug warmer for your friends, family and colleagues. Bring warmth to your loved ones in cold weather. Product name: heating coaster Material: ABS+hard glass Colour: black and white Power supply: USB Rated power: 10W Voltage: 5V/2A Basic function: 3-speed heating + 55 ° constant temperature insulation + 1 hour drinking water reminder Product size: 132X118X20mm Product list: 1 * heating coaster, 1 * USB Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.