Product Features:-High-brightne LED backlight.-316 stainle steel for long-term use even in -base, humid envment.-67 waterproof and dust-proof grade.-With curved gla (with anti-fog function).-Suitable for all kinds of vehicle modification.-Using ster motor drive pointer, accurate display of the engine speed ,and with the LCD display clear display mileage.Technical Data:52mm meter:-Installation Diameter: Φ52mm or 2"-Indication Range:0-30MPH 0-60MPH 0-80MPH 0-120MPH-Backlight:7 Backlights available (red, green, blue, , yellow, cyan, purple)-Function: Current speed, trmeter and -Trmeter and will record the mileage ar power off,but you can touch the blue wire with power negative to reset trmeter to 0.-Material: Stainle Steel 316L Bezel + Anti-fog Gla-Signal: -Working Voltage: 9~32V DC-Working Current: ≤100mA-Operating Temperature: -30℃ ~ 75℃-Storage Temperature: -40℃ ~ 85℃-67 waterproof and dustproof grade52mm :-Installation Diameter: Φ52mm or 2"-Indicating Range:0-3000RPM 0-4000RPM 0-6000RPM 0-7000RPM-Functions: current RPM and adjustable hour-Backlight color: Red-Adjustable Speed ratio:1.0-360-Operation mode: LCD display, ster motor-For Car /Truck/ Boat / Engine /oline EngineProduct Include:1x meter1x