[Keep Beverages Warm] -The cup warmer mainly keep your coffee, water, milk, tea, and other beverages at the perfect temperature for a long time, wherever and whenever, you can enjoy your favorite drinks at the perfect not-too-hot temperature.[Use Suitable Mug] -Use a thin-walled, flat-bottomed mug will have the best warmth retaining performance [Best Gift Choice] -Beautiful and design, keep your beverages always warm, It will be your best gift choice to show your care to your families, lover or on 's day, Thanksgiving, Christmas or other occasions to show your cares.3 gear of temperature adjustment.Suitable for school, dormitory and office, easy to use the cup cushion.[Attention] 1. we 't recommend use concave and thick bottom cup, the heating will be slow and bad heating 2. This is the cup warmer only, not the electric , it can not boil the water, it mainly the cooling speed of hot water, keep the hot water warm the whole day.3.If you to heat the cool water, you may have to wait for 30-50 minutes, or even , the max temperature will be 50-60, the you wait, the closer you will to 60.The heating speed depends on the thickness of cup bottom and water capacity 4. The product doesn't include the adpater, use your phone adapter or other USB sockets, and make the adapter output power 2A, or it can not enough power and the heating will be slow and weak.Power: 20W Model Number: Coffee Mug Cup Warmer USB for Tea Milk Water Use: USB Coffee Cup Warm Heating Type: USB Heating Coaster Feature1: Heating Coaster Feature 2: Warm Heating Pad Feature 3:Timing Heater Coaster for Milk Tea Application: Household /Office /Living Room color:Green Material:ABS Package Contents: 1 x USB Heating Coaster Only the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing.The measurement allowed error is +/- 1-3cm.