Unique USB Charging Design: Compared to other AA battery powered milk frothers, RATEL's new milk frother has a built-in 1200 mAh battery, no need to replace the battery frequently. A full charge can last up to 90 minutes. Greener.Adjustable 3 Speeds: Low speed operation at 4000 RPM can be used for mixing nutrients, making sauces, making milkshakes and baby formula. Running on medium speed at 5500 RPM can mix milk, eggs, coffee or other beverages. Running at 7000RPM makes milk froth, coffee, lattes and hot chocolate.Premium Quality and Food Safety: With food grade ABS+304 stainless steel mixing head, it is strong, light and safe. The powerful motor quickly produces fine foam that is not easy to sink and can be adjusted according to different cups. Low noise, high efficiency, never rust.One-button start: One-button button to adjust to the desired level according to the needs, the operation is simple, and there is no need to hold down when foaming. 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 deeply when changing accessories.)Material: Stainless steelDimensions: 3.1 x 3.1 x 17.4 cmpacking list:1 milk frother1 x Stainless Steel Spring Head Egg Whisk2 x Stainless Steel Double Spiral Egg Beaters1 x User Manual1 x USB cable