1、Smart car chassis accessories set parts, suitable for DIY tracing speed remote control car 2、Adopt acrylic body, it has good stability 3、The bottom plate is provided with a protective film to prevent scratching 4、With 3D assembly drawings, easy to install 5、Complete accessories, these DIY kits can improve hands-on ability Features: 1. Smart car chassis accessories set parts, suitable for DIY tracing speed remote control car 2. Adopt acrylic body, it has good stability 3. The bottom plate is provided with a protective film to prevent scratching 4. With 3D assembly drawings, easy to install 5. Complete accessories, these DIY kits can improve hands-on ability   Specification: Condition: 100% Brand new Item Type: DIY Smart Car Kits Battery: 4 x AA Battery(not included)   Package List: 2 X Car Chassis 4 X DC Geared Motors 4 X Yellow Wheels 4 X 20 Line Speed Code Dial 8 X Fastener 1 X 3d Assembly Drawing 1 Set Screw Nut Copper Column 1 X Battery Case