Pull out the orange object, turn the cover to open the battery box, install 2 AAA batteries. Description Material: Glass cup + plastic lid Capacity: 400ml / 13 oz Battery: Need 2*AAA battery (not included) Waterproof Design: Cover in battery port to prevent water ingress How to Use: 1.Add coffee powder2.Add hot water2.One button turn on to stir the coffee, one button turn off the powerNeed 2*AAA battery (not included) NOTE: Please do not stir thick drinks etc. It may be too viscous to stir. Easy to clean: This glass coffee mug can be used as a normal cup for drinking if you do not need stirring function. It's also easy to wash, but do not use a dishwasher or clean by full soaking. Auto Self Mixing Cup is perfect for coffee, tea or milk, and the lid keeps your drink hot and prevents spills. The cup is also made of high-quality, food-grade glass, and it's easy to clean with its detachable design, making it a valuable addition to any coffee or tea lover's collection. Glass Electric Mixing Cup Glass Electric Mixing Cup Glass Electric Mixing Cup Glass Electric Mixing Cup Glass Electric Mixing Cup Add to Cart Add to Cart Add to Cart Add to Cart Add to Cart Customer Reviews 3.9 out of 5 stars 126 3.9 out of 5 stars 126 3.9 out of 5 stars 126 3.9 out of 5 stars 126 4.0 out of 5 stars 107 Price $12.99$12.99 $14.99$14.99 $12.99$12.99 $11.99$11.99 $15.99$15.99 Material: Glass, Plastic Glass, Plastic Glass, Plastic Glass, Plastic Glass, Plastic Capacity: 400ml 400ml 400ml 400ml 400ml