Description Specification Brand TECHINGProduct Name V2 Double cylinder Engine Model KitsMaterial MetalTheme ScienceCompleteness Semi finished ProductProduct Weight 1 5350 kgPackage Weight 3 3700 kgProduct Size 19 00 x 14 40 x 21 00 cm 7 48 x 5 67 x 8 27 inchesPackage Size 33 50 x 23 60 x 14 50 cm 13 19 x 9 29 x 5 71 inchesFeatures Eco friendly aluminum alloy stainless steel material anodizing coloring process enduring and non toxic DIY assembled cultivate kids creativity and imagination Let the children have an interest in learning thus creating the ability of children s thinking mathematical combination logics Easy and funny to play Kids can learn the great power of power energy and the beauty of nature Ideal toy and gift for all children above 10 years old Powered by 2 lithium ion battery included 500mAh 3 7V Charging 40 minutes using no less than 30 minutes under full charge External power supply DC 10V 20V Assembly time about 3 hoursPackage included 1X Set of Assembled Accessories1X Box1X Tote Bag1X Chinese Graphic Manual2X Batteries