Features1[Mini Milk Warmer]: No need to worry about your baby not having warm milk while on the go again, the bottle warmer will automatically shut off and keep the milk warm. 2[Insulated Heating Band]: The bottle warmer has a fast heating speed and insulation, suitable for all bottles with a diameter smaller than 2.6in. 3[Milk Heating Options]: You can choose from 37DegreeC, 40DegreeC, 42DegreeC, 45DegreeC, 50DegreeC, or 55DegreeC, and heat the milk from its normal temperature to 40DegreeC just need 20 minutes. 4[6000mAh Battery]: The bottle warmer is equipped with a 6000mAh large capacity battery, allowing for approximately 4 to 5 uses before needing to recharge. 5[Wireless Charging]: The bottle warmer comes with built in rechargeable battery, allowing for wireless use. Simply place the bottle inside, and the bag will warm it up within a few minutes.SpecificationItem Type: Wireless Charging Bottle WarmerMaterial: ABS, PCBattery Type: Polymer Lithium BatteryBattery Capacity: 6000mAh (shipped with built in battery)Heat Preservation: 2.5 HoursHeating Speed: 20 MinutesCharging Time: 6 HoursCharging Method: USBPackage List1 x BottleWarmer1 x Data Cable1 x User Manual