[5 Adjustable Temperature Levels & 38C Constant Temperature]: This portable bottle warmer is made of PU and is safely insulated. 5-level temperature setting 38C, 42C, 46C, 50C, 55C temperature heating for different requirements, effective heat preservation of nutritious milk. The bottle warmer can be kept at a constant temperature of 38C, so that your baby can drink at any time. [Bottle Warmer for Most Baby Bottles]: Bottle warmer with removable cap. Adjust according to the size of the bottle, suitable for almost all ordinary milk bottles, simple and convenient and practical shape. [Easy to Clean Travel Bottle Warmer]: The portable bottle warmer is easy to clean, use a wet paper towel to gently wipe the stain on the leather cover, you can complete the cleaning job. Note: This bottle warmer is a low voltage USB warmer. It heats up slowly. It is not a product that can quickly heat a baby bottle. [USB Baby Bottle Cooler Bag]: Compatible with many types of 5V 2A USB devices such as power bank, laptop, charging adapter, etc. Package Includes - 1 x Milk Bottle Insulation Cover; 1 USB cable. [Portable]: Lightweight, small size, easy to carry, can be used at home, traveling, traveling, hiking, shopping, airplanes, trains and cars, can meet your child's milk needs anywhere and anytime.