Adjustable fastener, suitable for a variety of bottles (diameter: 55-80mm)
Power input: 5V2A 50HZ;Product features: 3 levels of temperature adjustment, continuous constant temperature heating
With this heating bag, baby can drink warm milk at any time, and keep warm at constant temperature. (Insulation requires USB to be connected to the power supply)
It can be used by connecting to mobile power, charging head, and car USB.
