2-1 Heating & Stirring Function: This portable bottle warmer for formula features 6000mAh battery, heating milk from room temperature to just need 10-25 minutes(depends on milk volumn). Defrost cold milk is available but needs 30-40 mins. If you prepare formula for baby, the stirring mode is recommendedWireless & Travel-friendly: Our travel bottle warmer is cordless and portable when you go travel. Ready breastmilk anytime and anywhere for parents on the go. 18W fast charging makes the baby bottle warmer can be fully charged in 2 hours, and can keep warm for 4-6 hoursLeak-Proof & Rechargable: For use when going out or on the go, this travel bottle warmer lid is leak-proof design to prevent milk from spilling and can be safely placed in a suitcase or backpack, convenient for busy parents. Rechargable when out of power anywhere6-speed Accurate Temp Control: There are 6 gear temperature for you to choose, 37℃~55℃(98.6℉~131℉). Preset the temperature you need and it will shut off automatically, not overheating. Safety technology guards your comfortable feedingPlease Note: Make sure that you charge it fully before you use it. If you heating and stirring function at the same time, it may work less time. Please do not use while charging