Description: The USB cup warmer allows you to maintain a constant temperature of coffee (131F/55C) throughout the day and enjoy warm coffee at any time in winter. A perfect gift for Valentine's Day, Christmas, or birthday. The USB cup warmer can be powered by a computer, power bank, and adapter, etc. Features: [Constant Temperature]The USB cup warmer keeps your beverages at the constant right temperature to 131F/55C. This temperature we design according to the health needs of the human body. [Gravity Sensor]Put the cup on it and it will heat automatically, take away the cup, and turn off the power automatically. [Widely Applicable]Useful coffee warmer for your desk, which warms coffee, tea, hot cocoa, etc. [Great Gift]It makes an excellent gift for your significant other, parents, friends, or any relative. [Easy to Use]Simply connect to the power adapter, and place the cup on top to begin the automatic heating. Specifications: Color: White Material: ABS, Glass Style: Practical Rated Power: 10W Rated Voltage: DC5V Application: Water, Drink, Coffee Occasion: Kitchen, Home, Office, Travel, etc Package Size: 17*13.3*4cm / 6.69*5.23*1.57inch Package Weight: 177g / 0.39lb Package List: 1 * Coffee Mug Warmer (Not Including Coffee Mug) 1 * USB Cable 1 * User Guide