Specification: Features: Portable Design---This USB baby bottle warmer adopts portable strap and can be hung on the , the packaging is convenient and firm, not easy to fall off, which is ideal for outside walk, shopping and travelling. 3 Gear Adjustable Temperature; This USB bottle warmer has 3 gear adjustable temperatures, 40°C, 50°C, 60°C heating gear which can be adjust according to our needs. Convenient USB Powered: This baby bottle warmer features USB powered and come with a USB cable which can connect to any power banks, car, laptops port, etc. It is portable for us to use it wherever we like. Universal: Suitable for a variety of milk bottles, while installed on, the heat preservation, suitable for all kinds of milk bottles. After the sale: We guarantee you a good shopping experience. Please do not hesitate to contact us first if there is a problem and we are always here to assist you. 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: cloth Inner diameter: 55-75mm Heating sheet material: silicone heating wire Voltage: 5v Current: 2v Package List: 1 Set Travel Bottle Warmer