HAOYI LCD Display Device for 5/5.5 Inches Size. This display is compatible only with 36V 12A controller or JIPIN controller. Please confirm the controller model before purchasing. Incompatible controller models may result in throttle malfunction. Display wiring instructions (match wire colors during installation): - Red wire: + (power supply voltage) - Black wire: - - White wire: Controller switch control line - Blue wire: RXD signal line - Yellow wire: TXD signal line - Green wire: Acceleration signal line Note: Instrument voltage setting (24V/36V) – Long press the middle button for 3 seconds to switch mode. Use up and down buttons to increase or decrease gears. Press up and down buttons simultaneously to enter the settings interface. Press the middle button to cycle through settings, use up and down buttons to adjust parameters. Press up and down buttons together to save settings. Material: Plastic Color: Black Package Contents: 1 x Scooter Display Note: Lighting and display differences may cause slight variations in color between the image and the actual item. Measurement error allowance: +/- 1-3 cm.