Features: _x000D_Customizable Warmth: Our Portable Milk Warmer Thermostat adjustables heating temperature, ranging from 38-55 C/100-131 F, ensures that your babies' milk is at the ideal temperature every time._x000D_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._x000D_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._x000D_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._x000D_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. _x000D_Notice:_x000D_1.Actual color may be slightly different from the image due to different light effect_x000D_2.Please allow 1-3cm deviation due to manual measurement_x000D_ _x000D_Description:_x000D_Material: waterproof fiber clothComposite heating sheet_x000D_Size: As picture show _x000D_Bottle diameter: about 8cm_x000D_Instructions for use:_x000D_1. Connect the product to the connecting line, and then to the power supply_x000D_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._x000D_3. You can freely change the gear manually. Press the power button once to change the gear_x000D_4. Press and hold to shut down_x000D__x000D_Package List:_x000D_1x Bottle Warmer_x000D__x000D_