Features 1. Suitable for modification of various vehicles. Uses a stepping motor to drive the pointer, accurately displays engine speed, and features a clear LCD display. 2. Offers high indication accuracy, repeatability, versatility, reliability, and stability with simple drive and control. 3. IP67 waterproof and dustproof rating with curved glass (anti-fog function), suitable for ships, boats, and yachts. 4. Ultra-wide working voltage design: long-term operating voltage 9-32V DC, up to 36V for less than one minute. 5. Compatible with various stepping gauges, designed for low power consumption and long service life. Specification 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 RPM and hour meter Operation Mode: LCD display, stepper motor Wiring: Red - Battery (+9-32VDC), Blue - Battery (-), Black - Signal, Orange/Yellow - Backlight (+9-32VDC) Indicating Range: 0-9990RPM Input Signal: Pulse signal from tachometer sensor, engine, alternator, ignition coil, crankshaft sensor, etc. Protection Class: IP67, capable of operating at 1m underwater Application: Tachometer suitable for car, truck, boat, diesel generator engine, and gasoline engine Package List 1 x 0-9990RPM Tachometer 1 x Connecting Cable 1 x Manual