The milk bubbler can produce rich cream foam in seconds. The food safety stainless steel mixer can rotate at high speed. This coffee frother is a good helper for making latte, cappuccino, Mocha coffee, bulletproof coffee, milk shake, hot chocolate an The milk bubbler has a built-in rechargeable battery and is charged through the USB port. It can be charged by computers, laptops, mobile power supplies, USB chargers, and mobile phone adapters. No need to change the battery frequently. Clean-up for this milk frother is even faster. To clean just put the whisk in hot running water and briefly turn it on. It is light and compact, you can carry it anytime and anywhere.