MH Head Up Display HUD for Car — OBD2+GPS Dual System, Black, Speedometer & Tachometer with Fault Scan

The MH Head Up Display is a dual OBD2+GPS instrument that projects live speed, RPM, temperature, voltage and diagnostic codes so you can monitor key driving data without looking down.

Designed for OBDII/EOBD cars made after 2008, this compact HUD combines vehicle-bus telemetry and satellite-derived metrics in one unit. It gives a clear readout of speed, tachometer, water temperature, battery voltage and other parameters, plus onboard fault scanning and customizable alarms, letting drivers spot problems and keep attention on the road.

How does the HUD show accurate speed and engine data?

The MH HUD pulls vehicle sensor data directly from the car’s ECU via the OBD2 port for real-time engine and sensor values, and switches to GPS mode when the car’s protocol is unavailable. That dual-system setup ensures continued speed reporting and basic trip metrics even if the vehicle bus is incompatible.

• OBD2 mode: direct ECU data for speed, RPM, water temp, voltage, fuel consumption and more
• GPS mode: satellite-based speed, altitude, satellite time and direction
• Automatic or manual switching between OBD2 and GPS
• Compatible with OBDII/EOBD-compliant petrol cars post-2008

What diagnostics and alerts can I expect from the device?

The HUD reads engine fault codes and shows error details on-screen; you can also clear codes directly from the device. It features programmable alarms for overspeed, high engine temperature, low/high battery voltage and RPM thresholds so you receive timely warnings while driving.

• Scan and display fault codes; clear codes with a short press of OK
• Set overspeed alarms between 5–200 km/h and RPM/temperature/voltage thresholds
• Real-time streaming of ECU parameters for performance checks and tests
• Acceleration and brake test functions to log short performance runs

How customizable and visible is the display for different driving conditions?

The unit offers multiple interface designs, eight backlight brightness levels and selectable units (km/h or mph, °C or °F) so you can tailor the presentation for day or night driving. Install it on the dashboard or attach it to the windshield with the included adjustable bracket for the best sightline.

• Ten interface styles and adjustable brightness (1–8) for visibility control
• Unit options for speed and temperature to match regional preferences
• Two mounting methods: dashboard bracket or windshield sticky mount
• Compact footprint to avoid obstructing the driver’s view

What car types or brands won’t this HUD support?

The MH HUD is built for standard OBDII/EOBD petrol vehicles manufactured after 2008 and will not work with older OBD I systems or some vehicle types and specific brands listed as incompatible. If your car’s OBD protocol is unsupported, the device will still provide GPS-based speed and trip features.

• Not compatible with diesel, hybrid electric vehicles, pickups, RVs, or heavily modified computers
• Known incompatible brands include Jeep, Peugeot, Citroën, Fiat, Renault, DS, Lamborghini, SIMCA and Suzuki
• If OBD2 protocol is unsupported, GPS mode remains available for speed and trip data
• Works only with OBDII/EOBD-compliant systems produced after 2008

Who is this for? Drivers who want a compact, easy-to-read secondary instrument to keep eyes closer to the road: daily commuters, performance-minded owners who monitor RPM and voltage, and drivers who want quick on-board fault scanning without a laptop. It’s ideal if your car supports OBDII/EOBD and you value timely alerts and a customizable display; if you own one of the excluded vehicle types or brands, review compatibility first, since GPS-only functionality remains as a fallback.