describe: Unique USB charging design: Compared with other Aa battery-powered milk frothers, Ratels new milk frother has a built-in 1200 mAh battery, eliminating the need for frequent battery replacement. It can be used continuously for 90 minutes when fully charged, which is more environmentally friendly. 3 levels adjustable: 4000 rpm low-speed operation can be used to mix nutrients, make sauces, make milkshakes and baby milk powder. It can mix milk, eggs, coffee or other beverages when running at a medium speed of 5500 rpm. 7000rpm high speed operation can make milk froth, coffee, latte and hot chocolate. High quality and food safety: strong, light and safe, with food grade Abs+304 stainless steel mixing head. The powerful motor quickly produces delicate foam that is not easy to sink, and can be adjusted according to different cups. Low noise, high efficiency, never rust. One-key start: Adjust to the required level according to your needs. One-key button, easy to operate, no need to press all the time when foaming. Easy to use and easy to clean. Let them enjoy the convenience of making chocolate or cappuccino. (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 (optional) packing list: 1 X milk frother 1 X stainless steel spring head agitator 2 X stainless steel double spiral stirrer 1 X User Manual 1 X USB cable