The portable handheld frother is powered by 2 AA batteries (not included) so you can take it on the go to froth milk and mix drinks anywhere. Portable size is convenient to carry makes sure you can enjoy your morning coffee although in traveling. Simple one-touch switch with a powerful motor but low noise level. Just put it into a container with liquid food up to approx 1/3 to froth. This mixer is made of food safe grade stainless steel shaft and whip that can be easily clean under fresh running water.