4 Motors With 4  Independent Encoders.  Fully Assembled with adjustable ground clearance and stretchy rubber tracks to maintain tension.

4 x 7.2 V motors,  stall current 2.5 Amp per motor

Output shaft stall torque 10Kg / cm

Gearbox ratio 86.8 : 1

Encoder type : Quadrature

Encoder resolution : 1000 state changes per 3 wheel rotations

Speed : 1 Km / hour

Manual included, with electronic quadrature circuit that controls encoders.  

Manufacturer : RoboSavvy, still going.

Unused, still boxed.