Comes with charger. Quick Heating & Precise Temperature Design: Portable bottle warmer can warm 4oz to 98℉ in as little as 3 minutes. Our 4 temperature settings mean the perfect temperature for your baby's bottle Allowing you to customize the temperature to your exact preferences, ensuring that your bottle is always the right temperature. Choose from 80℉, 98℉, 103℉ or 110℉. Portable for travel & cordless design: The Baby's Brew portable bottle warmer features a cordless, battery-powered design making it easy to pack anywhere and take with you on the go. Now you can feed your baby anywhere, making traveling a breeze. Warm up to 8 bottles before needing to recharge. Holds temperature for up to 12 hours. 🔋Super Battery Capacity: The Baby's Brew bottle warmer features a large battery capacity that can last for 8-12 hours after a full charge, which typically takes between 3 to 4 hours. Additionally, it comes with a USB-C charging cable. This design ensures that your baby's milk is evenly heated. Leak proof silicone ring ensures that all of your baby's milk stays in the bottle. Portable bottle warmer fits most wide neck bottle brands (Avent, Chicco, SpeCtra and more), plus we offer a variety of separate adapters to fit other sizes including Dr. Brown's Narrow and Wide neck, Medela, MAM, Comotomo, Boon, Tommee Tippee, NUK Parent's Choice, Nanobebe and many more.