2WD Obstacle Avoiding Robot Car Kit for Arduino

Description:
our car frame has the following advantages:
1 mechanical structure is simple and very easy to install.
2 car comes with tachometer wires 20 meters, with gun shop photoelectric systems can be quickly formed a gun. It can speed, distance, composed of closed circuit systems.
3 with four cars on the battery compartment, convenient for the whole power system. at the same time provided with a switch, easy start-stop. without further very convenient, so that the entire system is highly integrated
4 auto shop with L298N driver module, four monitoring modules, as well as 51 control unit seamless, simple and good-looking components of the system!

Note:
1.Please allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bid.
2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!

Package  list:
the car chassis x 1
Car wheels x 2
DC gear motor  2 48: a DC motor deceleration (otherwise 120: 1 Optional)
20 line of code disc Gun x 2
fasteners (high intensity black acrylic)  x4
caster x 1
four battery box  x 1
A quality Rocker Switch x 1
assembly drawing x 1
V5 shield x 1
UNO R3 x 1
SG90 x 1
FPV x  1
L298N x 1
various screw nut