【Dual Function Modes】The baby bottle warmer has defrosting and heating dual function modes, which can shorten the heating time and improves the efficiency of warming milk, saving parents time and hassle. 【4 Temperature Settings】The travel bottle warmer supports 4 levels of temperature setting(37℃, 40℃, 45℃, 50℃) to meet the needs of different usage scenarios. 【With Sealing Ring & Milk Bottle Adapter】Innovative L-shaped sealing ring increase the heating area by 10%; equipped with a transfer interface, the bottle warmer is suitable for various brands of milk bottles with a diameter of 50mm/ 53mm/ 56mm. 【Safe and Portable】Food grade material to safeguard the health of baby's entrance; small and lightweight design, convenient to carry around and perfect for outdoor/ travel use. The portable milk warmer is the ultimate solution for on-the-go feeding. 【Long Battery Life】The portable bottle warmer has a built-in 4400mAh large capacity battery that supports long working time and can be charged by the provided USB cable. You can warm milk anytime anywhere.