High quality and practical performance Smart Thermostat,good for boiling water and heat preservation Helps you to drink tea and coffee in car easily Voltage:12V Instructions: 1. Please cleaned cup body and the parts with a neutral detergent before use 2. Before using it,please add a small amount of water preheating,pre-cooling,heat preservation,keeping cold 3. Clockwise tighten the lid to prevent leakage 4. Do not be placed next to a heat source, so as not to affect the function 5. If added dry ice, carbonated beverages, etc., must prevent liquid splashing wounding, or high internal pressure cause the lid can not be opened Tips: can boil about 10 minutes, capacity is 300ml Colour:silver Material:stainless steel Size:19.3*8.5*6.5cm Package Contents: 1 x Car 12V Bottle Heater Cup Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.