YSTD&reg; New Automatic Plain Mixing Coffee Tea Cup Lazy Self stirring Mug Button Pressing Super mute motor, you don't hear any noise, it has already finished its work It's great for tea, coffee, hot chocolate and soups, Simply press the "stir" button and have the hard work done for you! Power by:2 x AAA Batteries (Not included) Capacity: 350 ML Size :10.5*13.5*8.8 cm /4.13"*5.31"*3.46" (Approx.)