Feature:1. Premium Material: Made of premium ABS and PU, the milk bottle thermal bag is sturdy, reliable, practical and has a long service life.2. Usage: Put the cold water into the milk bottle, and then put the milk bottle into the milk warmer, and then use the USB charging milk bottle warmer.3. Keep: When heated to 42 degree centigrades, the constant temperature lights up and stays at that temperature. With accurate temperature control and real time monitoring, the bottle thermal is made of multiple heat preservation material, power saving and sturdy.4. Hook and Loop: With hook and loop, the baby bottle warming bag can be adjusted, more fit for different bottle diameters and bottle types.5. Multi Layer: Spring temperature control head can accurate measure temperature, the rechargeable water bottle thermal bag can keep milk and water at about 42 degree centigrade.Specification:Item Type: Milk Bottle Thermal BagMaterial: ABS, PUWeight: 293g/10.34ozColor: AS ShownCurrent: 2APower: 18WBattery: 3000mah x 2P Lithium Polymer Battery(Included)Range: 37 Degree Centigrade, 40 Degree Centigrade, 42 Degree Centigrade, 45 Degree Centigrade, 50 Degree Centigrade, 55 Degree CentigradeCharging time: 3-4 hours, normal temperature to 45 heating time: 45-60 minutes (outdoor use, please preheat about 30 minutes in advance)Heat preservation time: After the heating is completed, the electricity can support heat preservation for about 2 hours, if you do not use the milk warmer to heat, the direct heat preservation can support heat preservation for about 5 hours..Package List:1 x Milk Bottle Thermal Bag 1 x Use Manual 1 x USB Power Cable Note:Please make sure that the bottom of the bottle is tightly attached to the temperature controller head with spring on the base, otherwise the temperature controller will not be able to measure, resulting in too high temperature. Please make sure that the temperature is appropriate before feeding.