Portable Bottle Warmer Equipped with an 8000mAh battery, the bottle warmer is mainly designed for keeping ready milk warm for 5 - 8 hours when fully charged. Please do not heat cold milk from refrigerator. Thanks to battery improvements, it charges fully with 18W power & 9V-2A adapter in 3 hours. Lightweight design, ideal for parents on a trip or on the go. 6-speed Precise Temperature Control: This baby bottle warmer features 6-speed temperatures starting from 37 - 55 (98F - 131F) shown on the LCD screen. Special for baby, it's perfect for warming breastmilk and formula. The package includes a 9V - 2A USB cord, compatible with mobile appliances and power banks, ensuring convenience for travel, outdoors, hotels, and home use. Comfortable Night Light Mode: No worry for night feeding, because constant-temp mode can keep the preset temperature for a whole night, ensure that your baby has an access to warm milk at any time, perfectly soothing hunger and crying baby. Keep Nutrition From Breaking: This milk warmer for baby can automatically stop heating when the milk is at a setting temperature, protecting the breastmilk from losing nutrition, maximizing nutrition for your baby. Unlike traditional warmers that heats breastmilk with steam heat, causing OVERHEAT easily and destroying breastmilk proteins. Fits Most Brand Bottles: The portable bottle warmer for travel is suitable for various size and shapes of baby bottles with a diameter of 2.8inch, including standard, wide-neck, and angled bottles. This versatility makes portable bottle warmer for breastmilk an ideal solution for parents who use various types of bottles for their baby.