SpecificationName: Rechargeable wireless milk warmerMaterial: ABS+cloth coverColor: whiteProduct Size: 8.7x5.5x14.5cm / 3.43x2.17x5.71inCharging time: 4.5 hoursBattery life: approx. 3 hoursBattery capacity: 5200mAhPower: 10VVoltage: 5VConstant temperature 42 ℃ (temperature difference ± 2 ℃), suitable for bottle diameter s6.5cm, to keep warmDESCRIPTIONQUALITY MATERIAL: The insulation sleeve is made of high quality insulation material, which can effectively maintain the temperature of the bottle and ensure that the milk your baby drinks is at the right temperature, safe and reliable6-speed temperature adjustment: the insulated sleeve is equipped with 6-speed temperature adjustment function, you can choose the right temperature according to different needs.PORTABLE: We offer an innovative solution for busy parents to experience convenience like never before. Powered by rechargeable batteries, the Portable Bottle Warmer is a small and portable bottle warmer designed to provide warmth without the need for bulky cords or outlets. It is versatile and can be easily adjusted to fit most bottle shapes and sizes.LONG LIFE: Our portable bottle warmer has a 5200 mAh battery capacity and can last up to 5 hours on a single full charge, depending on the use of each heated bottle.Versatile: easily adapts to bottles up to 6.5 cm in diameter. The Portable Bottle Warmer varies depending on the number of ounces in the bottle, but can take as little as 3-5 minutes. Simply select the desired bottle temperature and wait until the bottle reaches the selected temperature.Product List1*Bottle Warmer1*usb cable1*Instruction manual