Features: 12 Main Functions: This smart digital meter has many functions, including speed, RPM, water temperature, battery voltage, fuel consumption, driving time, driving distance, oil temperature, air-fuel ratio, intake pressure, ?turbine pressure, and data stream. Adopt Imported AI Chip, Intelligent Reminder: Speed color will change at different speeds. It will change to red color once the speed is over 120. Simple And Easy To Operate: The digital display is easier to read. Short press in the button vertically to switch the display mode, pull right to choose the mode, and long press in to enter the setting. Alarm System: Set different parameters for the over-limit alarm and audible alarm to improve driving safety. Car Performance Test: Test the vehicle's 100km acceleration and driving distance, the test results are accurate, and let you know the performance status of the vehicle. Specifications: Item Name: Smart Digital Meter Main Material: ABS Display Size: 2.2 Inch Environment Temperature: -40 celsius - +80 celsius Operating Voltage: 9V-16Vdc (12Vdc/ 400mA) Relative Humidity: 10percent -95percent Alarm Sound Level: more than 30dB(A) Atmospheric Pressure: 86-106KPa Environmental Noise: less than 60dB(A) Color: Black Product Size: 73*68*46mm Product Weight: 50g Package Information:? Package Size: 14.3*9*5.1cm Package Weight: 180g Package List: 1 * Smart Digital Meter 1 * OBD Cable 1 * Non-Slip Mat 1 * Manual