Features 1、The generator transmission wheel is suitable for teaching children basic physical basis. 2、It is also a good toy assembly model for practicing hands and brain learning. 3、It has a 180 motor which is more powerful than 130 motor. 4、100% brand new and high-quality. 5、It is made of premium material,durable and has long service life. Specification Features: The generator transmission wheel is suitable for teaching children basic physical basis. It is also a good toy assembly model for practicing hands and brain learning. It has a 180 motor which is more powerful than 130 motor. 100% brand new and high-quality. It is made of premium material,durable and has long service life. Specification: Size:90*80*60mm/3.5*3.1*2.4in Material:ABS Plastic Motor Type:180 Motor and 300 Motor Battery:2*AAA Battery(Not Included) Package List: 1*180 Motor 1*300 Motor 1*180 Bracket 1*300 Bracket 1*Green Plate 2*Belt Pulley 3*Belt 1*Cord Connector 1*Heat Shrink Tubing 3*Diode 1*Battery Case 10*Screw 1*Screwdriver Package List