ELING Engine Tachometer Gauge 3000 RPM for Diesel with Red Backlight 85mm 12V 24V

Open a 338 dimension and 234 depth hole put gauge into it and fasten Speed Ratio 1300 adjustable You can press the back button to adjust it Idle speed is typically 600800rpm Details refer to owner manual Suitable for diesel engine Tachometer can get signal from engine ignition coil crankshaft sensor or tacho sensor be sold separately etcIf you need tacho sensor pls search for ASIN NO B07RN3HJ72 It shows rpm and hour Hourmeter cannot be reset If you need other faceplate pls search for ASIN B0755KWGQR or B0755L49GG Red Backlight 932VDC12VDC24VDC Working Voltage 100 Waterproof and antifogging protection