1. Power function set, a set of 4 pieces 2. Technic series parts, suitable for a variety of power function tools, servo modules, and electric train motors, can be used for building power function model sets 3. The set includes: - 1 power function train motor - 1 9V AAA battery box (the battery box requires 6 AAA batteries, but the batteries are not included) (Kind reminder: New and old versions are randomly shipped. They have the same function but slightly different appearances.) - 1 infrared receiver - 1 infrared speed remote control 4. The battery box requires 6 AAA batteries, and the batteries are not included. 5. Warning: Due to the presence of small parts, it is not recommended for children under 3 years old. 6. Regarding shipping: All items will be shipped within 3 business days after receiving payment. In most cases, you will receive the items within 8 - 12 days. The actual delivery time depends on the specific situation. 7. If you have any questions, please feel free to contact us. 8. During the shopping process, if you have any questions, please consult us at any time. We will reply to you within 6781 hours. Have a pleasant shopping! 9. Thank you for your cooperation. We will make you satisfied.