Unique USB Charging Design: Compared with other AA battery-powered milk frothers, RATEL's new milk frother has a built-in 1200 mAh battery, which means there is no need to frequently replace the battery. A full charge lasts for up to 90 minutes. Greener. Adjustable 3 Speeds: Low speed at 4000 rpm can be used for mixing nutrients, making sauces, milkshakes, and infant formula. At medium speed at 5500 rpm, milk, eggs, coffee, or other beverages can be mixed. At 7000 rpm, milk foam, coffee, latte, and hot chocolate will be made. Premium Quality and Food Safety: With a food-grade ABS+304 stainless steel mixer head, it is strong, lightweight, and safe. The powerful motor quickly produces fine foam that is not easy to collapse and can be adjusted for different cups. Low noise, high efficiency, never rusts. One-Button Start: One press to adjust to the desired level as needed, operation is simple and there is no need to hold down when frothing. 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 it too deeply when changing accessories.) Material: Stainless steel Dimensions: 3.1 x 3.1 x 17.4 cm Packing list: 1 milk frother 1 x Stainless steel egg whisk with spring head 2 x Stainless steel egg whisks with double spirals 1 x User manual 1 x USB cable