Specification:- Name: Tachometer - 7 Colors Backlight - High Precision - Size:85mm - Signal : Pulse - Working voltage: 9-32VDC - Working current: 120mA - Backlight :7 Color backlight - Engine hours: 0.0-99999.9H - Working temperature: -30-70 - Storage temperature: -40-85 - Waterproof and dustproof grade IP67. - Functions: current tacho/RPM and hour - Operation mode: LCD display, stepper motor - Tachometer fit for Car /Truck/ Boat /Diesel Generator Engine /Gasoline EnginePackage Included1 X Boat Tachometer 1 X Cable 1 X InstallationFeature:- Waterproof:IP 67 - Excellent anti-fogging function; - With curved glass( with anti-fog function). - 316 Stainless steel bezel with curved glass; - Convenient Installation by multi-plug socket connecting way; - ( red,yellow,orange,green,blue,purple,white ), customers can adjust any color that you like - Tachometer fit for Car /Truck/ Boat /Diesel Generator Engine /Gasoline EngineIndicating Range:0-8000RPM[85MM Diameter] 0-7000RPM[85MM Diameter] 0-6000RPM[85MM Diameter] 0-4000RPM[85MM Diameter] 0-3000RPM[85MM Diameter]Sensor Specification:1].Name: Tachometer Gauge Sensor [2] Use for Gear Rotation Speed Measurement [3] Combining The Advantages of Stable Signal, Wide Range of Operating Temperature, Small Size, Simple Assembly, Etc [4] Signal Duty Factor: 475% [5] Output Signal: Sine Wave [6] Operating Temperature:-40 to 85 [7] Inductance Distance: Less Than 1mm [8] Tooth Module: 2~6 [9] Connecting Way: Two Wires Connecting [10] Protection Rank:Waterproof IP67 Please attention: Please attention we have 2 model sensor size: 80mm*18mm (L*W) , 72.12mm *16mm(L*W) Package Included(as picture): 1X Tachometer Gauge Sensor