Name:Car LCD 2 in 1 Gauge ( Speed Meter + Odometer Gauge ). Special Features: Speedometer. Other Part Number: auto tuning. Item Width: 85mm. Manufacturer Part Number: Speedometer. Placement on Vehicle: Front. Item Height: 85mm. Item Length: 85mm. GPS Car Speedometer: LCD Instrument Panel. Waterproof: Speed Odometers Gauge. Feature: Alarm LCD Gauge. Instrument Panel: Odometer Gauge Meter. Working voltage: 12V/24V. Measuring range: 0M-160M. Measurement accuracy: 1M Working environment temperature: -20 C - -50 C, Working environment humidity: 45% - 75% RH. Measuring range: speed 0-160km/h Mileage: 0-999999.9km Overspeed alarm: driving speed set value Overspeed alarm factory value: 80km / h When overspeeding, the upper right corner alarm displays a prompt, no sound prompt Magnetic pole pairs: factory value is "8" Speed ratio: the factory value is 1:624 Measurement accuracy: 0.1% Installation and use: The black wire is connected to the positive pole of the power supply (+), the black and white wire is connected to the negative pole of the power supply (-), and the odometer senses three wires: the red wire is connected to the + on the sensor, the black wire is connected to the - on the sensor, and the yellow wire is connected to the G.X.S on the sensor. The operation is as follows: First, start the car. Second, short press for 1 second, the mileage shows ODO and TIPA rotation, select ODO. Third, press and hold for 10 seconds to 15 seconds to display the mobile phone number. Fourth, when the vehicle starts and exercises to 60 yards, press 1 second to display 000000 to enter the setting function. Press 2 seconds, the setting is completed. Note: 1.Professional Installation Is Highly Recommended! 2. High speed stepper motor with a quick response ! Colour: Black material: plastic Package Contents:1 x Car LCD 2 in 1 Gauge ( Speed Meter + Odometer Gauge ) Only the above package content, other are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.