MAIMEIMI GPS Speedometer 85mm (3-3/8") White TFT Waterproof Boat & Car Gauge — Odometer, IP67, 9–33V

MAIMEIMI GPS Speedometer is a compact, waterproof 85mm (3-3/8") digital speed and distance gauge with a bright TFT display and external antenna for accurate GPS-based speed, odometer and course readings in mph, km/h or knots.

This marine-grade instrument combines a clear color TFT screen, IP67 protection, and a wide 9–33V operating range so you can mount it on boats, cars, tractors or trucks. Because it uses GPS to determine speed over ground (SOG), the gauge requires no mechanical connection to your drivetrain and can display real-time speed, trip distance, total odometer, and heading. Initial satellite lock can take roughly 30 seconds and improves with an unobstructed sky view.

How quickly and accurately will it show my speed?

The MAIMEIMI GPS speedometer reports Speed Over Ground (SOG) instantly after satellite acquisition. Expect first-time signal lock in about 30 seconds, with faster fixes in open sky conditions. The screen updates smoothly and displays speed to one decimal place when selected.

• GPS SOG range: 0–600 km/h
• Three units: km/h, mph, knots (switchable)
• Decimal precision: rounded to one decimal
• Bright TFT for clear daytime and low-light viewing

What distance and trip data does the gauge record?

This unit stores both a cumulative odometer and a trip meter for short journeys. The odometer displays up to 999,999 km and is adjustable using the rear button; the trip counter shows 0–999.9 km but resets to zero when power is removed. These functions help track total mileage and individual trips without mechanical sensors.

• ODO: 0–999,999 km, adjustable from the back
• TRIP: 0–999.9 km (resets when power is cut)
• COG (Course Over Ground) displayed as heading pointer
• No physical speed pickup required — GPS-based readings

How do I install and protect the unit on a boat or vehicle?

Installation requires an 85mm (3-3/8") front panel cutout and about 55mm depth behind the dash. The gauge is IP67-rated, offering dust-tight construction and water protection suitable for marine splashes; anti-fogging keeps the display visible in humid conditions. Connect to a 9–33V DC source and route the external antenna where it has an unobstructed view of the sky for fastest satellite lock.

• Panel cutout: 85mm diameter, depth clearance: 55mm
• Working voltage: 9–33V DC for wide vehicle compatibility
• IP67 waterproof and anti-fogging protection
• External antenna included — mount with clear sky sightline

Can I use this speedometer across different vehicles and units?

Yes — the instrument is designed for multi-vehicle use including boats, cars, tractors and trucks as long as you can provide a secure dash mounting and power source. Unit selection (km/h, mph, knots) is user-switchable, making it convenient when you change vehicles or travel internationally.

• Compatible with marine and automotive 9–33V systems
• Unit toggle: km/h, mph, knots
• Portable installation for retrofit applications
• Bright TFT display suitable for daytime and low-light use

Who is this for: The MAIMEIMI 85mm GPS Speedometer suits boat owners, overland drivers, fleet vehicles and anyone needing a reliable, non-mechanical speed and distance readout. Choose this gauge if you want quick GPS speed fixes, a clear color screen, waterproof protection for wet environments, and flexible unit options for mixed-use across vehicles.