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 40C 50C 60C 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 effect2.Please allow 1-3cm deviation due to manual measurementMaterial: cloth Inner diameter: 55-75mmHeating sheet material: silicone heating wireVoltage:5vCurrent: 2v includes: 1 Set Travel Bottle Warmer