Description: A newly designed tank chassis with a beautiful appearance, fine processing, sandblasted and oxidized. The all-metal construction makes the tank more stable and strong. In this chassis tank a space for servo 9g is left for the ultrasonic sensor and a space for servo is also left to turn the mechanical manipulator! What's more one R3 and NodeMCU development boards are also designed to install In addition, the metal panel can be used to install the car with wheels by installing Interesting, With the help of the engine, the tank chassis can turn smoothly to the left, right, circular, forward and backward, etc. Whole car looks very beautiful and generous. Driven by the motor, the car can be flexibly rotated back and forth. The trolley carbon brush DC motor has a Hall sensor for speed measurement and feedback. A newly designed tank chassis with a beautiful appearance, fine processing, sandblasted and oxidized. The all-metal construction makes the tank more stable and strong. Specification: Material: metal Product detailed size: 268 x 219 x 71mm/10.55 x 8.62 x 2.80inch (length * width * height) Package Includes: 1 Piece Chassis 2 Piece Drive wheel 6 Piece Bearing wheel 2 Piece Track 2 Piece Motor 1 Piece ESPduino development board 1 Piece 2-way motor & 16-way servo expansion board Screw: several 3 Piece Hexagon wrench 2 Piece LED lights 1 Piece Battery box