UNIQUE USB CHARGING DESIGN: Compared with other AA battery operated milk frother, RATEL new version milk frother with1200 mAh battery inside,and no need to replace batteries frequently. It can last for 90 minutes when fully charged.More environmentally friendly. ADJUSTABLE 3 SPEEDS: Low speed operates at 4000 RPM can be used to mix nutrients, make sauces, make milkshakes and infant milk powder. Medium speed operates at 5500 RPM can mix milk, eggs, coffee or other drinks. High speed operates at 7000RPM can make milk foam, coffee, latte and hot chocolate. PREMIUM QUALITY & FOOD SAFETY: It is sturdy, light and safe with a food grade ABS+304 stainless steel mixing head. The powerful motor quickly produces a fine foam that is not easy to sink, and can be adjusted according to different cups. Low noise, high efficiency and never rust. ONE BUTTON START: Adjusted to the required level according to demandOne-touch button, easy to operate, no need to keep pressing when foaming.It is easy to use and easy to clean.Let them enjoy the convenience of making chocolate or cappuccino at home. (It is not recommended to insert too deep when replacing accessories.) Material: Stainless steel Size: 3.1 x 3.1 x 17.4 cm Color: Silver, Pink, Black, White(option) Package List: 1 x Milk Frother 1 x Stainless Steel Spring Head Whisks 2 x Stainless Steel Double Spiral Whisks 1 x user manual 1 x USB cabl