Feature: 1. Applicability: The baby bottle warmer is suitable for 5‑8cm diameter milk bottles, and is suitable for milk bottles made of plastic, silicone, glass, iron cans, cartons and other materials. 2. Heat Preservation Function: The baby brew bottle warmer can keep the temperature and make feeding easier at night, and will ensure that your baby only drinks hot milk from now on. 3. With USB Data Cable: This milk bottle warmer is attached with USB data cable, you can connect the data cable to any mobile power supply, car USB or laptop interface. 4. Easy to Use: Just wrap the baby bottle warmer around the bottle and then connect the warmer to the mobile power supply or charging head to ensure that the baby's warm milk is fed at the temperature of 43‑47 celsius degree at anytime and anywhere. 5. Cotton Material: The portable baby bottle warmer is made of premium cotton material, with a comfortable touch and durability, which can ensure a long time of use. Specification: Item Type: Baby bottle warmer Material: Cotton Weight: Approx. 70g/2.5oz Product Expanded Size: 29x15cm/11.4x5.9in Color: Blue Power: USB 5V voltage, 2A current Applicable Milk Bottle: 5-8cm/2-3.1in in diameter, all kinds of milk bottles on the market can be used Applicable Milk Bottle Materials: Plastic, silicone, glass, iron can, carton and other materials Product Function: Keep the original temperature constant for a long time. Package List: 1 x Baby Bottle Warmer Note: 1. The output of USB power interface should be 5V 2A. If the power supply current is small, it may cause slow or no heating, please use the USB 5V 2A standard charger.2. Do not heat the empty cup.