Item Type: Self Stirring Mug Material: Stainless Steel, Plastic Product Size: Approx.13.4 x 9.3cm / 5.3 x 3.7in (Manual Measurement, There Will Be 0-0.5cm Error) Product Capacity: 301ml-400ml Battery Type: Lithium Battery (Shipped With Built in Battery) Battery Capacity: 350mAh 1、Strong Power: 7000 rpm, with strong power, it can cool down hot drinks, and the protein shakes can be stirred for a smoother taste. 2、Material: Built in 304 stainless steel, no rust and more durable, durable and wear resistant, odorless, will not be hot when pouring water. 3、Wide Caliber Cup Mouth: Fluent water, easy to clean, whole body washing, no worry about rinsing. 4、Applicability: The automatic blender cup is suitable for coffee, tea, hot chocolate, milk, protein shakes, lemonade or other mixed drinks. 5、Gift: Magnetic charging design, suitable for home, travel, office, business, picnic, this is the best gift for family, friends and colleagues.