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When it is not charged, it can achieve constant temperature for two hours. When it is charging, it can maintain the constant temperature.
Suitable charging range: car usb interface, laptop usb interface, usb socket, mobile power.
It can be inserted into 2A-5V usb for constant temperature.
1*usb charging cable
1*bottle thermostat bag
Gereton Baby Milk Bottle Thermostat Bag Portable USB Heating Intelligent Warm Milk Tool Insulation Cover B07ZJ3M62T