Description:  Short press the right click,can loop switch ODO, TRIP,MAX 3 states.   Press the right button in the state of the ODO, you can switch the LCD backlight whose default is blue backlight, which can be changed to orange,and return to blue when you loose the press.  Right-click on the TRIP and TRIP to zero.  MAX:Display speed,first the hour field flash,after a short-pressing it can add 1 hour,then you long press the minute field start to flash,it will also add 1 minute after a short press,and exit after long press.  Background Settings:long press both the left and right button,you can start to settings,it will flash when you in,short press the left button to modify,short press the right button to come to the next settings,and the setting order is as: Perimeter - mode - speed pulse number - speed signal polarity , short press the right button to save and exit.  Unit, engine failure lamp, water temperature lamp negative control: left and right turn signal, far lamp, positive charge   Size Chart: Size:Approx.14.3x10x5.5cm/5.6x3.9x2.2inch Package Includes: 1Piece Digital instrument 1Piece instruction 1Piece sensor Note: All dimensions are measured by hand, there may be small deviations. Color may vary slightly due to the color setting of each individual monitor. Thanks for your understanding. Please enjoy your happy shopping time