Features: Customizable Warmth: Our Portable Milk Warmer Thermostat adjustables heating temperature, ranging from 38-55 C or 100-131 F, ensures that your babies' milk is at the ideal temperature every time. On-the-Go Convenience: Our Portable Milk Warmer Thermostat design with a safety USB interface means you can connect it to a power banks, car charger, or even a plug - providing warmth on demand, anytime, anywhere. Designed for Your Peaces of Mind: Our USB Baby Bottle Warmer is crafted from premium materials, including thick Waterproof fiber cloth and electronic components, ensuring both warmth and safety. Save Time, Worry Less: With our bottle warmer, you can save time and enjoy every moments with your babies. No more waiting - just warmth, comfort, and smiles. Widely used: This baby bottle warmer bag is a great present for any new mother. Suitable for shopping, travel, picnics, and other places you take your child with you. As long as your child needs it, you can heat milk anytime and anywhere. Notice: 1.Actual color may be slightly different from the image due to different light effect 2.Please allow 1-3cm deviation due to manual measurement Description: Material: waterproof fiber clothComposite heating sheet Size: As picture show Bottle diameter: about 8cm Instructions for use: 1. Connect the product to the connecting line, and then to the power supply 2. Press and hold the power button for 3 seconds to turn on the power. The default high-end setting is 55. It will automatically switch to 2nd levels 50 in 30 minutes, then 3rd-levels 46 in 30 minutes, then 4th gear 42 in 30 minutes, then 5th levels 38 in 30 minutes, keep the constants temperature at 38, and do not shut down. 3. You can freely change the gear manually. Press the power button once to change the gear 4. Press and hold to shut down Package List: 1x Bottle Warmer Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.