Tachometer Gauge Pointer and LCD Digital Display 85mm Step Motor RPM Meter with Backlit Black Dial Silver Bezel for Car Truck RV Boat 4000RPM Item Type: Tachometer Size: Approx. 85mm / 3.35in Material: 316L Stainless Steel Bezel + Fog Proof Glass Accumulated Hours: 0.0-99999.9H Guard Level: IP67, Fully Waterproof, Excellent Anti Fog Function Input Signal: Stepper Motor Backlight Color: Red (Default), Green, Blue, White, Yellow, Yellow Green, Orange, Purple Working Voltage: 9-32VDC Working Current: ≤60mA Operating Temperature: -30°C to +75°C Storage Temperature: -40°C to +85°C Guard Level: IP67, can work underwater at 1m depth Wiring: 1. Red Wire - +9-32VDC 2. Black Wire - Sensor Signal 3. Orange Wire - Backlight (+) 4. Blue Wire - Power Supply Negative (-) Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.