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: Alloy Product detailed size: 250 x 215 x 55mm/9.84 x 8.46 x 2.17inch(length * width * height) Model: DT25-370 Reduction ratio: 1:75 Rated voltage: 12V Motor shaft diameter: 4mm High-precision Hall code disc (with high precision and strong anti-interference ability) Package Includes: 1 set Panel 4 Piece otor 2 Piece Drive wheel 4 Piece Load wheel 2 Piece Track (freely removable) 1 set Screw 1 set 18650 battery box 1 set Allen wrench