Specifications: DIY mini vacuum cleaner assembly toy, exercise child's hands-on ability, understand simple circuit and mechanical transmission. Working principle: The motor rotates at a high speed, causing the fan to discharge air from the bottle mouth to the outside of the bottle, thereby forming a negative pressure in the bottle. Finally, suction is generated at the mouth of the bottle, and the dust is sucked into the bottle. Type: DIY Vacuum Cleaner Material: Wood Powered by: 2 x AA Batteries(Not Included) Length: 150mm - 180mm/5.91" - 7.09" (Approx.) (Depends on the Bottle Length) Diameter: 80mm/3.15" (Approx.) Notes: Not included the bottle. Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x DIY Vacuum Cleaner