Product details of 4WD Smart Robot Car Chassis 4WD Kit Multi-Functional 4WD Smart Robot Car Double Layer Acrylic Chassis Plate 26cm Kit Without Battery Holder For Arduinos Uno R3 Electronics Circuitry & Parts

1. Speed Encoder for Arduino
2. Mechanical structure is simple, very easy to install .
3. The car comes with tachometer encoder
4. Uses four deceleration direct current machine curve to be nimble, the directive is good. Four actuation, horsepower fullness. The chassis big and steady very easy to expand
5. Size:25 x 15 cm
6. carrying capacity: About 1Kg