Efficient Warming: The device is designed to heat up your baby's bottle in just 20 minutes and can stay warm for a generous 2-3 hours on a full charge. With 4-5 heat ups per charge, it provides reliable warming for your baby's milk. It features 6 temperature settings, including body temperature (37C), warm (40C), and very warm (45C), with additional options at 42C, 40C, and 55C. 6000mAh rechargeable battery is included. Portable and Travel Friendly: Ideal for on-the-go parents, the bottle warmer can easily fit into diaper bags, strollers, backpacks, and other on-the-go accessories, allowing you to prepare a bottle for your baby whenever they need it. Exquisite Material: Features an adjustable wrapping velcro bottle grip made of faux leather on the outside and advanced reflective material on the inside, which heats quickly and retains heat for longer periods. Battery Indicator Flashlight: The battery indicator lets you know when it's time to recharge the battery, ensuring that you never run out of power. The included flashlight offers added convenience in low-light conditions. Comes with a USB-C charging port, making it easy to charge the battery from various devices. Fits Most/All Bottles: The bottle warmer is designed to expand up to 3.25" in diameter, making it suitable for holding bottles of various sizes. Note: Warming time frame depends on the starting temperature of the milk. Frozen milk or ice cold milk may take up to an hour to warm in the warmer.