DIY 4WD Smart Robot Car Chassis Kits with Speed Encoder

Specification: Size of Car: 26cmx17.5cm Material: Acrylic Wheels diameter: 6cm Thickness of board : 3mm Length of board :25cm Width of board : 14.8cm Weight: 448g Feature: 1.Mechanical structure is simple,so it is easy to assemble. 2.This car have 4pcs deceleration DC motor,it can corner well. 3.The car comes with speed encoder, cooperate with our speed of photoelectric, can rapidly form a speed measuring system. Can speed, range, form a closed loop system. 4.Can use with other devices to realize function of tracing, obstacle avoidance, distance testing, speed testing, wireless remote control. Packaging Included: 2X Car Chassis 4X Deceleration DC Motor 4X Wheels 4X 20 line Speed Encoder 8X Fastener 1X Screw Pack