The Smart Bottle + Breastmilk Warmer is the only warmer with Smart Bluetooth Control and PerfectWarm Precision Warming Technology, featuring 2 warming modes to safely & evenly warm breastmilk and formula. Steady Warm Mode uses a warm water bath to safely warm or defrost breastmilk to preserve its nutrients unlike other bottle warmers that only use steam heat which destroys breastmilk proteins. Quick Warm Mode uses steam heat to rapidly warm formula and baby food. Perfect for combo feeders. Use the FREE Baby Brezza app to operate the warmer and get alerts when your bottle is done so you don't have to babysit your warmer. This revolutionary warmer also warms more precisely than other warmers - just select your settings, then the warmer chooses the proper warming time, and shuts off automatically when finished. Fits virtually all types/sizes of bottles, milk storage bags and baby food jars. 1 year limited warranty