Chassis1 pieceBattery container1 pieceWheel2 piecesDecelerationDC motor2 piecesHammer caster1 pieceFastener4 piecesEncoder disc2 piecesSwitch1 pieceM3*30 screw 4 barsM3*6 screw 8 barsM3 nut 6 piecesM2 nut 2 piecesL12 spacer 4 barsM3*8 screw 2 barsM2*8 screw 5 barsStep1: Tear off the yellowprotection wrap of the chassis, thefastener and the encoder disc.Insert the fastener into thechassis.Step2: Install the encoder disc andx the motor to the chassis.(Attention,the copper sheet of theleading wire of the motor shouldface inside).Step3: Fix the motor to the chassis,then insert and tighten the screws.Insert the motor to the shaftof the wheel.Step4: Insert the spacer and tightenthe 8 screws to x the hammer caster.Servo1 pieceServo bracket1 pieceUltrasonic bracket1 pieceServo accessories1 pieceArduino board1 pieceMotor drive board1 pieceUltrasonic module1 pieceStep5: Fix the servo bracket,install the servo,x the servo accessories.Step6: Fix the ultrasonic bracket,install the ultrasonic module.Step7:Connect the Arduino boardwith the motor drive board,place it on the chassis.Step8:Position the battery container on the chassis.Need to use:M3*30 screw 4 barsM3 nut 4 piecesNeed to use:L12 spacer 4 barsM3*6 screw 8 barsNeed to use:M3*8 screw 2 barsM3 nut 2 piecesM2*8 screw 3 barsM2 nut 2 piecesNeed to use:M2*8 screw2 bars