85mm 3000-8000 RPM For Boat Tachometer Marine Tacho Meter Gauge LCD Hourmeter 12V/24V Car Tachometer Toerenteller 12v Hour Meter Specifications Name: Tachometer Materials: stainless steel+nickel-plated plastic Operating Current: 100MA Adjustable speed ratio: 1-300 Size: 92x50mm Range: 0 ~ 200km / h Voltage: 12V / 24V Backlight: Red. Installation diameter: 85mm or 52mm Tacho sensorModel:M18*1.5 Tacho Sensor M16*1.5 Tacho Sensor Indicating Range: 0-8000RPM[85MM Diameter] 0-3000RPM[85MM Diameter] 0-4000RPM[85MM Diameter] 0-6000RPM[85MM Diameter] 0-9990RPM [52MM Diameter] Features 1.Convenient Installation by multi-pliug socket connecting way;. 2.Excellent anti-fogging function. 3.Protection grade is IP67, the whole body is completely waterproof. 4.Pluse Signal from tacho sensor, engine, alternator, ignition coil, crankshaft sensor, etc. 5.Opration Mode: LCD Display, stepper motor. 6.High Precision. 7.Suitable for all kinds of vehicle modification, the use of stepper motor drive pointer, accurate display engine RPM, and with the LCD display clear display hour, with instructions of high precision, repeatability and versatility, reliability and stability, drive And control is relatively simple and so on. Install Instructions: 1.Before installation , firstly ,to open a hole (Dia:85~87mm) of the panel, make sure there is a space with (70mm backyard of panel) as well 2.Put the gauge in the hole. 3.Mount the gauge in hole, twist the back cover on after adjustment. Package Include 1 x Boat Tachometer 1 x Installation Notes: Due to the manual measurement, there might be some error. Sensor and the gauge need to be purchased separately.