USB Rechargeable - The USB rechargeable milk frother is built-in with 1200mA rechargeable battery. You can charge it anytime and anywhere with your computer, power bank, laptop, mobile power, vehicle, USB charger. Easy to carry, ideal for parties and picnics Adjustable in three speeds - This milk frother has 3 speeds: low speed - OFF - medium speed - OFF - high speed - OFF, so that you can turn it off at any time without going through all the gears. It can relax your hand. Easy to clean - The stainless steel whisk is replaceable and easy to clean under running water. Please note that the body of the milk frother machine is not waterproof, so please do not immerse it in water. Multifunctional electric whisk - The portable coffee frother comes with 2 premium food grade stainless steel whisks. One is ideal for coffee, latte, cappuccino, hot chocolate, beverages, gives that professional finish to your drinks. Another is ideal for whisking egg, which is a great tool for kitchen. Tips for use: If you need a certain speed, please adjust the speed before use. 1 indicates light means low speed; 2 indicates that the lights mean medium speed; 3 indicate lights means high speed For example, if you need medium speed, please switch to indication light 1, then stop, then turn on the milk frother next time it is 'will display in medium speed.