Features: 1.Using stepper motor drive pointer, with instructions of high precision, repeatability and versatility, reliability and stability, drive and control is relatively simple, etc. 2.Stepper motor is used for full range of stepping gauges, has advantages of less power consumption, longer life, higher precision and so on. 3.Adopting 316L stainless steel for long?term use even in acid?base, humid environment. IP67 protection class, also with curved glass (anti?fog function). 4.With ultra?wide working voltage design, long?term operating voltage: 9?32V, maximum up to: 36V, (1min). 5.There is a snap together with the harness connector, for firmly connected, in order that the gauges could work even in strong viberation. 6.Suitable for most vehicle modification, can be used for the engines/generating units, ships, construction machinery, agricultural machinery, automotive modification, etc. Specification: Item Type: Automotive Speedometer_x000D_ Material: Stainless Steel 316L Bezel + Anti-Fog Glass_x000D_ Install Diameter: 85mm or 3-3/8in_x000D_ Indication Range: 0-120KM / H_x000D_ Operating Voltage: 9-32VDC_x000D_ Input Signal: GPS Signal_x000D_ Backlight Color: Red_x000D_ Operating Current: 60mA_x000D_ Operating Temperature: -30-+75_x000D_ Storage Temperature: -40-+85_x000D_ Protection Class: IP67, Can Work Underwater 1m / 39.4in Position_x000D_ Functions:_x000D_ Needle Shows Current Speed:_x000D_ LED Window Shows: TRIP/COG(Choose Anyone) and ODO_x000D_ TRIP01(Default): One-Trip Mileage Which Will Come Back to 0 after Power off, _x000D_ TRIP02 One-Trip Mileage Which Accumulates After Power Off, But You Can Press Set Button for 3-5 Seconds to Clear the Data._x000D_ COG: Moving Direction_x000D_ ODO: Recording Total Mileages Automatically and Cannot be Reset_x000D_ Operation Mode: LCD Display, Stepper Motor_x000D_ Installation Notes:_x000D_ 1. Open a hole with a diameter of 85mm on the panel (your cabin panel and instrument panel), insert the instrument into the hole, the panel corresponding to the instrument panel is marked with a boss, and open a small notch at this position, to ensure that there is at least 85mm (3-3/8in) instrument panel on the back of the instrument_x000D_ 2. After installing the instrument into the panel, screw down with the fixing ring_x000D_ 3. Connect the wires, the instrument shell is directly connected to the 12 / 24V power supply_x000D_ 4. Insert the wire harness and fix it firmly on the table_x000D_ How to Use: Install the instrument on the instrument panel and fix it, and then turn on the power_x000D_ Wiring Instructions: _x000D_ Red wiring - Positive_x000D_ Blue wiring - Negative_x000D_ Black Signal Wiring - Sensor_x000D_ Orange backlight wiring - Positive Note: Not include GPS