Milk frother makes hot and cold milk froth for cappuccinos, heats hot milk for lattes. Maximum capacity: 125 ml (for milk froth preparation), 250 ml (for hot milk preparation) Maximum level indicator for milk frother and maximum level indicator for milk warmer, and minimum milk level indicator Stainless-steel exterior with vacuum insulation; Detachable base; FREE cleaning brush. Product for use with North American Electrical Standards, 120V only. ETL. 2-YEAR Warranty To make hot drinks, press the ON/OFF button once and release immediately, both heater and frother will turn on. Press and hold the ON/OFF button for 3 seconds, the frother will turn on, but heater won't turn on. This makes cold drinks.