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TN GPS Digital Speedometer(52mm)


-Fixing dimension: 52mm(2")r Ground

-Indicating Range: 0~999 (MPH, Knots, Km/h adjustable) 
-Switch unit between MPH(Mi), Knots(NMI) and Km/h (KM) by Backside Button 
-Total Mileage Adjustable, Mileage Range: 0-99999.9 (Mi,NMI,KM available)
-Trip Counter
-Working Voltage: 12V/24V 
-GPS Blind Area Odometer Compensation
-OverSpeed Buzzer Alarm (Value Adjustable) 
-Working temperatures: - 40 to 85°C
-Operation mode: LCD display, stepper motor 


-Suitable for all boats, yachts, vessels, vehicles and off-road vehicles 
-The signal comes directly from the satellite signal receiver(GPS Antenna), don't need other speed sensor. 
-The gauge has the advantages of high precision, quick location confirmation and short start up time. 
-IP67 waterproof and dustproof grade 
-Reverse polarity protection and anti-fogging performance 
-No Stationery Drift 
-Stepper motors used for full range of stepping gauges, great feature with its less power consumption, longer life, higher precision, etc. 


1. Cut an Φ52mm (2-1/16") hole in the panel (II) and allow a clearance of 55mm (2 3/16”) behind the panel to fit the gauge.

2. Remove fastening ring (I), insert gauge through panel from the front. Tighten gauge (III) using fastening ring (I)from the rear.

3. Connect cables according to the diagram/label.

4. Connect GPS Antenna to the socket in the back of the gauge and put it in the good position pointing the sky directly.

5. After turning on the power, allow the gauge to search for satellite signal for 1 minute. The gauge will show speed in knots/km/mph.

Function Select: “ODO”,“BUZZ” , “UNIT”

Firstly, please use External Button or use a pin to press the internal button through the back hole.

Press and hold on the button, then turn on the power supply.

The LCD will show ODO, BUZZ, etc. 

You can select the function after releasing the button.

1.“ODO”(change total odometer)

After selecting “ODO”, the LCD will show “5000” (for example 5000 km) , press the button to change the flashing digit from 0 to 99999 to set up the target odometer value.

2.“BUZZ”(change overspeed buzzer alarm threshold value)

After selecting “BUZZ”, e.g. the LCD will show for example “B 80” (buzzer will be on when speed over 80km/h), press the button to change the flashing digit from 10 to 240 to set up the target overspeed buzzer alarm threshold value.

3.“UNIT”(switch unit between km/h, mph or knots)

After selecting “UNIT”, the LCD will show km/h, mph or knots. Please choose your favorable unit.

4.How to reset trip odometer to zero?

Press the button at the backside of GPS speedometer, or the external button. Hold on for 2~3 seconds, then the trip odometer will reset to zero.

Package Included:

1x GPS speedometer 

1x GPS Antenna

1x Multi-plug socket 

1x Installation Instruction


  • Shanghai Eling Electronic Machinery Co., Ltd.
  • Address :

    Room 926, No.11 Lane 225, 

  • Jinxiang Rd.,Pudong District, 

  • Shanghai, China 

  • Tel :+86 21 3175 0330
  • Mobile+86 137 9531 5352
  • E-mail:
TN GPS Digital Speedometer(52mm)