Product Name: Wood 4WD Smart Robot Car Chassis Kit Model NO.: HC020 Color: Wood Style: Educational Toy Toy Department: All Material: Wood Function: With Remote Control, Electric, Arduino Age: Above 14 Years Type: DIY Toys Trademark: DAGU Transport Package: Simaple Box Origin: Cn HS Code: 90230090 Product Description Including:4*DC gear motor4*wheels1*4AA battery holder4*20 line tachometer encoder8*Fastener1*3D assembly drawings1*Several pillars screw nut1*boxonly the above package content, other products are not include.