Portable Feeding Bottle Warmer: Our portable bottle warmer can solve the milk heating problems of cold day and outdoor feeding, which can preserve heat and keep warm for 24 hours, portable to take and convenient to use. Adjustable Heating Temperature: Our bottle warmer featured with adjustable heating temperature from 38-55 °C/100-131 Fahrenheit scale, circulating constant temperature heating, can meet your different heating purpose, efficient maintenance and keep water, milk with constant temperature. Selected Material: The bottle warmer cover made by qualified PU leather, thick layer material, durable electronic components, nontoxic, better warm keeping performances. Safety USB Interface: The feeding bottle portable warmer support USB interface with type-C charging cable, can easy to connect with plug, power bank, car charger, convenient and stable to use. Applicable for Various Bottles: The feeding bottle warmer with upgrade designed and feature with adjustable hook & loop fasteners with wide range application fit for various shape or size feeding bottles.