1Suitable for all kinds of vehicle modification, using a stepper motor to drive the pointer, accurately display the engine speed, and has a clear LCD display. 2It has the characteristics of high indication accuracy, versatility, high reliability and stability, and relatively simple control. 3IP67 waterproof and dustproof grade, with curved glass, antifog, suitable for all s, boats, yachts and so on. 4Ultrawide working voltage design, longterm working voltage is 932V, maximum voltage is 36V (less than 1 minute). 5The stepping motor is suitable for all stepping gauges and has the advantages of low power consumption, long life, and high accuracy. Condition: 100% Brand New Item Type: BoatTachometer Material: Stainless Steel+Nickel-Plated Plastic Backlight: Red Installation Diameter: Approx. 85mm/3.3in Operating Voltage: 12V/24V Operating Current: 100 MA Functions: High accuracy current tacho/RPM and hourOperation Mode: LCD display, stepper motor Connectioning: Red-Battery(+9-32V DC) Blue-Battery(-) Black-Signal Orange/Yellow-Blacklight(+9-32V DC) Indicating Range: 0-4000RPM Input Signal: Pluse Signal from tacho sensor, engine, alternator, ignition coil, crankshaft sensor, etc.Protection Class: IP67, can work underwater 1m position Application: Tachometer fit for Car /Truck/ Boat /Diesel Generator Engine /Gasoline Engine 1 x BoatTachometer 4000RPM 1 x Connecting Cable 1 x Manual 1. Each of our products will be with a detailed product manual. The manual will clearly describe the installation, wiring and use of the product, so there is no need to worry about the situation that it will not be used after purchase.2. Each product is packaged in a hard carton, and the bubble cotton is antidrop filling, ensuring that your order remains in a brand new state before receive it.