DIY 4WD Smart Robot Car Chassis Kits with Speed Encoder

Specification Size of Car 26cmx17 5cmMaterial AcrylicWheels diameter 6cmThickness of board 3mmLength of board 25cmWidth of board 14 8cmWeight 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 Chassis4X Deceleration DC Motor4X Wheels4X 20 line Speed Encoder8X Fastener1X Screw Pack