MAIMEIMI GPS Speedometer 85mm (3-3/8") White — Waterproof IP67 TFT Screen, Multi‑Unit Odometer

MAIMEIMI's 3-3/8" (85mm) GPS speedometer is a waterproof, multi-unit digital gauge with a bright TFT screen and external antenna for fast satellite speed and odometer readings on boats, cars, trucks, and tractors.

This compact marine-grade gauge combines a responsive GPS sensor with a clear TFT display so you can read speed, trip and odometer data in mph, km/h or knots. Designed for 9–32V systems and rated IP67, it resists water and fogging and fits into a standard 85mm dash cutout. The unit includes an external antenna for quicker satellite lock and provides Course Over Ground (COG), Speed Over Ground (SOG), trip, and adjustable odometer functions for versatile use on both land and sea.

How quickly does the MAIMEIMI GPS speedometer get a satellite fix?

The gauge usually acquires a GPS signal within about 30 seconds the first time; subsequent fixes are faster when the antenna has a clear sky view. Signal speed depends on antenna placement and surrounding obstructions.

• First-time lock: approximately 30 seconds
• Faster reacquisition with clear sky and good antenna placement
• External antenna included for improved reception
• Works reliably in open-water and open-road environments

What measurements and units can this speedometer show?

The display toggles between three units—km/h, mph and knots—rounded to one decimal place. It shows real-time Speed Over Ground (SOG), Course Over Ground (COG), trip distance, and an adjustable odometer up to 999,999 km.

• Units: km/h, mph, knots (switchable)
• SOG range: 0–600 km/h for high-speed accuracy
• ODO: 0–999,999 km, adjustable via rear control
• TRIP: 0–999.9 km (resets when power is off)

Is the MAIMEIMI gauge durable and easy to install?

Yes — the unit is IP67-rated for waterproofing and has anti-fog protection to maintain screen clarity. It fits a standard 85mm (3-3/8") dash hole with a 55mm depth clearance and runs on 9–32V DC, so it adapts to most marine and vehicle electrical systems.

• Ingress protection: IP67 waterproof and anti-fog
• Install cutout: 85mm diameter, 55mm mounting depth
• Operating voltage: 9–32V DC for wide vehicle compatibility
• Compact housing fits boats, cars, trucks, tractors and more

How does the display perform in varied lighting conditions?

The TFT screen delivers clear contrast for daytime visibility and remains readable in low light. Brightness and the digital layout are optimized for quick glances while underway or on the road.

• TFT panel for crisp, high-contrast readouts
• Designed for daylight and dim conditions
• Large numerals and pointer-style course indicator for fast reading
• Anti-fog protection preserves visibility in humid environments

Who is this for? If you need an accurate, weather-resistant speed and distance instrument that works across boats, cars and utility vehicles, the MAIMEIMI 85mm GPS speedometer is built for owners who want satellite-based speed and odometer data without complex wiring or additional sensors. It’s a strong choice for boat owners replacing a fuel-speed gauge, drivers wanting a GPS-backed speed readout, fleet vehicles needing a universal voltage range, and anyone who needs clear unit switching between km/h, mph and knots.