product description Movement: stepper motorSelf-check function Diameter:2/52mm Power:DC(10-15V) 12V Professional Condition:100% New in Box & Good Quality. Backlight color: can choose (preset 7 colors) Tachometer (0~10000 RPM) Applicable models: suitable for 4-6-8 cylinders of gasoline vehicles Package : 1 X Tachometer Gauge 1 X Installation instruction Boost gauge(-1~2 Bar) Package : 1x Turbo Boost Gauge 1x PVC hose 1xT-Fitting 1x Sensor 1x Installation instruction Boost gauge (-30~30 Psi) Package : 1x Turbo Boost Gauge 1x PVC hose 1xT-Fitting 1x Sensor 1x Installation instruction Water temp (40~140 Celsius) Package List: 1 * Water Temp Gauge 1 * Water Temp Sensor(Sensor mounting thread: NPT 1/ 8 ) 1 * User Manual(English) Oil temp (40~140 Celsius) Package List: 1 * Oil Temp Gauge 1 * Oil Temp Sensor(Sensor mounting thread: NPT 1/ 8 ) 1 * User Manual(English) Oil pressurer (0~7 Bar) Package List: 1 * Oil Pressure Gauge 1 * Oil Pressure Sensor(Sensor mounting thread: NPT 1/ 8 ) 1 * User Manual(English) Voltage gauge( 8-18V) Package List: 1 *Volt Gauge 1 * User Manual(English) Air fuel gauge Oxygen sensor type: Narrow band Oxygen sensor output voltage: 0~1 V Package List: 1 * Air fuel Gauge 1 * User Manual(English) Exhaust GAS gauge (300~13000 Celsius) Package List: 1 * Exhaust GAS Gauge 1 * Exhaust GAS Sensor 1 * User Manual(English)