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 controllers 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: To set instrument voltage (24V/36V), long press the center button for 3 seconds to switch modes. Use up and down buttons to increase or decrease gears. Press up and down buttons simultaneously to enter settings menu. Press center button to toggle between 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: Other items not included. Lighting and display differences may cause slight color variations between image and actual product. Measurement error allowance: +/- 1-3 cm.