USB milk frother Rechargeable: The handheld milk frother is powered by built-in rechargeable battery, without battery replacement, eco-friendly and saving your money. It also comes with a cool green light shows full battery and red shows low battery , convenient in daily use.One time charge,dozens of days use. 3 Speeds Adjustable Coffee Frother: 3 Gears allow you to choose different speeds to achieve ideal frother effect.Low speed for Mixing protein powder drinks. Middle speed for making matcha tea. High speed for creating creamy milk froth which can be used in coffee, latte, cappuccino, and drink. 2 Replaceable Versatile Whisks: There are 2 replaceable versatile whisks available.