Rechargeable built-in battery power can be used without steel ring, long-term use will reduce the sound, very convenient for mixing eggs, milk, and coffeeEasy to clean under warm tap water or immersed in detergent. Wash by hand in warm water and then dryMixer for mixing egg, milk, foamer, protein shake, coffee, etc.Built-in Battery: It is Rechargeable, Long lasting battery.Portable: Take it away on holidays or camping trips to add something special to your hot drinksEasy to clean: Run the frother under warm running water or occasionally dip the wand in hot soapy water before rinsing. Turn it on again to spin dryMulti-Purpose: Electric Egg beating, mixing protein shakes, coffee mixer, hot chocolate, liquid maker and othersStylish Design: Soft-touch ergonomic handle, a long plastic cylinder cover that fits over the spinning wand for storage your rechargeable coffee makerThis has many uses, including egg beating, mixing protein shakes, coffee, hot chocolate, and others.