Double Function Design: Bottle Warmer combines a noise machine and a milk warmer to create a sleep environment while ensuring your baby's milk always at the right temperature. It is portable and ideal for home use and travel Enhanced Sleep Experience: Bottle Insulation Cover has six built in sounds, including rain, crickets, birds, waves, seagulls, and night frogs, which help your baby fall into a deep sleep by creating a calm atmosphere Efficient Heating Technology: Milk Warmer features 360 uniform heating to quickly heat milk without waiting. Constant heat ensures that nutrients are preserved for easy absorption by your baby User Friendly: Designed with simplicity mind, Milk Bottle Insulation Cover includes an easy to read large screen temperature display and intuitive buttons that make it easy for even new parents or grandparents to use MultiFunction: Milk Heater Keeper fits a variety of bottle sizes, and its compact size allows you to easily feed your baby at home or on the go, leaving 1 hand to hold your baby Specification: Rated voltage 7.4V Rated power 18W Capacity 5800mAh Size Chart: 8.5cmx18cm/3.35inchx7.09inch Package Includes: 1 Bottle Warmer 1 data cable Note: Please allow slightly errors due to manual measurement and different monitors.