The combinationinstrument is a combination of using the whole circuit board, microcontroller programming control, stepper motor driven pointer instructions, pen segment or dot-matrix LCD screen display distance, time, body and engine information, light-emitting diode lighting, backlighting, and a new combinationinstrument sounds alarm . In the structural parts, the combinationinstrument used streamlined design, plastic friction welding process, the overall the snap-in installation method, laser permanent markings.