Features: 1.Universal tachometer with 0?6000RAM indicating range, high accuracy instructions for maximum reliability, easy to drive and control. 2.Stepper motor is used to drive the pointer, provides accurate motor RPM display and clear LCD time display. 3.Features high versatility and stability, has excellent anti?fog function, convenient Installation by multi-plug terminal connecting way. 4.Whole body IP67 waterproof, suitable for all kinds of vehicle yeacht boat RV moto modification. 5.Equipped with a detailed product manual that will clearly describe the installation, wiring and use functions of the product to eliminate use disorders. Specification: Condition: 100% New Item Type: Tachometer Material: Stainless Steel + Nickel-Plated ABS Size: Approx. 85mm/3.3in Operating Current: 100MA Operating Voltage: 12V/24 Indicating Range: 0-6000RPM Tacho sensor Model :M18 x 1.5 Tacho Sensor, M16 x 1.5 Tacho Sensor Input Signal: Pluse Signal from tacho sensor, engine, alternator, ignition coil, crankshaft sensor, etc. Adjustable Speed Ratio: 1-300 Protection Class: IP67, the whole body is completely waterproof Backlight: Red Display: LCD Display Motor: Stepper Motor Instructions: Before installation, firstly, you need to open a hole(Dia:85-87mm/3.3-3.4in)of the panel, make sure there is a space with (70mm/2.8in backyard of panel) as well Put the gauge in the hole. Mount the gauge in hole, twist the back cover on after adjustment. Note: Each product is packaged in a hard carton, and the bubble cotton anti?drop filling will ensure that your order remains in a brand new state before receipt.