Feature 1、It is suitable for the modification of various vehicles. It uses a stepping motor to drive the pointer, accurately displays the engine speed, and has a clear LCD display. 2、It has the advantages of high indication accuracy, repeatability and versatility, reliability and stability, and relatively simple drive and control. 3、IP67 waterproof and dustproof grade, with curved glass (with anti-fog function), suitable for all ships, boats, yachts, etc. 4、With ultra‑wide working voltage design, long‑term operating voltage is 9‑32V, maximum can up to 36V (less than 1 minute). 5、It is suitable for all stepping gauges and has the characteristics of low power consumption, long service life. Condition: Item Type: Tachometer Gauge Material: Stainless Steel+Nickel-Plated Plastic Backlight: Red Installation Diameter: Approx. 52mm/2in Operating Voltage: 9-32V DC Operating Current: ≤60MA Functions: High Accuracy current tacho/RPM and hour Operation Mode: LCD display, stepper motor Connectioning: Red-Battery(+9-32VDC) Blue-Battery(-) Black-Signal, Orange/Yellow-Blacklight(+9-32VDC) Indicating Range: 0-9990RPM 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 Package List 1 x 0-9990RPM Tachometer1 x Connecting Cable 1 x Manual Note Each product will be shipped with a detailed product manual. The manual will clearly describe the installation, wiring and use functions of the product, so don't worry about the situation that will not apply after purchase.