- USB Compatibility & Portability: This baby bottle warmer is designed for convenience, compatible with DC 5V 2A USB devices such as power banks, laptops, and charging adapters. Its compact design includes a hanging cord for easy transport and storage, making it ideal for use at home or in the car. Please note: it does not have a built-in battery. - Quick Heating: The bottle warmer efficiently heats breast milk to a comfortable temperature of 38-40° Celsius in just 35-55 minutes. Ensure you allow at least 40 minutes for the bottle to warm thoroughly, providing your baby with a perfectly heated meal whenever needed. - Adjustable Diameter: Featuring a strong magic sticker on the edges, this warmer accommodates a variety of baby feeding bottles with diameters ranging from 5-8 cm. This versatility ensures it fits most of your bottles, making it a practical choice for busy parents. - Excellent Heat Retention: The portable design ensures even heat distribution, keeping baby milk at an optimal temperature of 38-40° Celsius. This feature is perfect for parents on the go, allowing your baby to enjoy warm milk during travel. Use Scenarios: 1. Perfect for road trips: Keep your baby's milk warm and ready during long car rides. 2. Ideal for home use: Conveniently warm bottles while multitasking around the house. 3. Great for outdoor activities: Ensure your baby has warm milk while enjoying picnics or outings.