Feature: 1. Educational Toy: Assemble the model with your children to enhance parent child interaction, at the same time, popularize science knowledge for them, develop psychological logical thinking, innovation and creativity, exercise practical ability, and build self confidence. 2. Enjoy Fun: Composed of more than 200pcs parts, the assembly takes about 1 to 2 hours, you will experience the whole process from small parts to finished products and feel more sense of fulfillment. 3. Metal Model: The parts are made of anodized aluminum and stainless steel, and are cast by high precise CNC process, have better texture, exquisite appearance, and more sturdy. 4. Dynamic Simulation: Adding clean water can simulate the scene of drilling oil pumping, the head can be driven by the transmission shaft to simulate oil production. 5. Excellent Accessories: Adopt quiet motor, reduce discomfort caused by noise and make mechanical movement more artistic, equipped with 680mAh lithium battery, the mechanical model can last long in motion. Specification: Item Type: 3D Pumping Unit Model Material: Anodized aluminum, stainless steel Charging Voltage: DC5V Battery: 1 x 603040 polymer lithium battery 3.7V 680mAh (built in). Package List: 2 x Crank1 x Motor Bracket1 x Motor Housing1 x Lower Box1 x Upper Box1 x Beam1 x Walking Beam2 x Connection Positioning Block1 x Lamp Cover1 x Universal Night Light1 x Lamp Pole Connection Block (Upper)1 x Lamp Pole Connection Block (Lower)1 x Motor2 x Gear Box Bracket1 x Circuit Board1 x Switch1 x Battery1 x Battery Fixing Piece1 x Power Interface1 x Battery Cover1 x Base Panel1 x Base1 x Lamp Pole2 x Bracket A2 x Bracket B1 x Driven Shaft1 x Piston Shaft2 x Connecting Rod1 x Check Way Valve Sleeve1 x Guardrail Base1 x Guardrail1 x Donkey Head1 x Filter Box1 x Well Upper Cover1 x Upper Connection Block1 x Check Valve Body1 x Large Pulley1 x Driven Gear1 x Compression Nut1 Box of Accessories (No.039 to No.079, refer to the manual and the real object for details)1 x Instruction