Specification Name: Tachometer Product Name: Tachometer Diameter: 2"/85mm Working Current: 100 mA Working Voltage: 9-32V DC Material: Stainless Steel + Nickel Plated Plastic Connection: Red - Battery (+9-32V DC), Blue - Battery Black - Signal, Orange - Backlight (+9-32V DC) Indication Range: 0-3000 RPM / 0-4000 RPM / 0-6000 RPM / 0-8000 RPM Input Signal: Pulse signals from speed sensors, engines, alternators, ignition coils, crankshaft sensors, etc. Adjustable Speed Ratio: 1-300 Protection Level: IP67, suitable for operation up to 1 meter underwater Features: Designed for vehicle modifications. Utilizes a stepper motor to drive the pointer for accurate engine speed display. Equipped with an LCD screen to clearly show the hour. Offers high indication accuracy, repeatability, versatility, reliability, and stable performance. Simple to operate and control. Installation Instructions: Before installation, drill a hole (diameter: 85-87mm) on the panel and ensure at least 70mm of clearance behind the panel. Insert the meter into the hole and secure it using an M4 nut and C-bracket. Package Includes: 1 x Tachometer, 1 x Cable, 1 x User Manual, 1 x Tachometer Sensor