Geekcreit 4WD Smart Robot Car Chassis Kits With Strong Magneto Speed Encoder For Arduino 51

Feature:

The height between two chassis can be change by diffirent copper pillar
20 line Speed Encoder, more accurate than 6 or 10 one

Motor Specification:

Package included:

2 x Smart car chassis (Acrylic)
4 x DC gear motor (strong magnet, testing by EMC)
4 x 20 line speed encoder
4 x Tyre
8 x Fastener
Some screw, nut and copper pillar