GPS Speedometer W Pro 85mm 3-3/8 in - Waterproof 0-120 MPH

In this review of the GPS Speedometer W Pro 85mm 3-3/8 in the reviewer focuses on drivers and boaters who need a compact, reliable digital speed and distance instrument. The unit is aimed at anyone replacing an electrical speedometer or adding a GPS-based readout where mechanical sensors are unavailable. The single biggest reason to buy is its straightforward GPS operation combined with an IP67 waterproof housing, which keeps a clear, illuminated readout in wet or marine environments while recording total mileage with power-off memory.

Key Features

• 85mm size: The 85mm (3-3/8 in) diameter fits common gauge pods and keeps a compact footprint in tight dash panels.
• GPS speed sensing: Uses the included GPS sensor so the speedometer works without a vehicle speed sender and supports 12/24 volt negative ground systems.
• Rugged construction: IP67 waterproof, rustproof and anti-fog design provides reliable performance in wet, marine or harsh conditions.
• Clear display: White dial, red needle and red LED illumination with a convex lens and 316 stainless bezel offer high visibility and a premium look.
• Odometer memory: Records up to 99999.9 miles and keeps mileage with adjustable and power-off memory functions for long-term tracking.
• Complete kit: Ships with speedometer, GPS sensor, power harness, gauge visor and installation instructions so the gauge is ready to install.

Who It's For

This instrument is best for car, truck, motorcycle and marine owners who want a ready-to-install GPS speedometer that handles wet conditions and looks factory-fit. Its waterproof, rustproof housing and bright face make it especially useful for small boats, yachts or trucks exposed to the elements.

Those who need highly specialized telemetry, CAN bus integration, or integrated multiple-sensor dashboards should look elsewhere, as this product is a single-function GPS speedometer and odometer without complex networked features.

Pros & Cons

Pros

• High quality stepper motor movement gives smooth needle response and a polished analog feel with a digital backbone.
• IP67 waterproof and anti-fog housing keeps the display readable in rain or marine spray.
• Included GPS sensor and harness make installation straightforward for both 12V and 24V negative ground systems.
• Odometer with adjustable and power-off memory preserves total mileage reliably for long-term use.

Cons

• Some users reported mixed durability and occasional accuracy disagreement, so real-world performance may vary with mounting and GPS reception.
• Does not include a gauge mounting cup in the package and that accessory must be purchased separately if needed.

Specifications

Size	85mm (3-3/8 in)
Speed range	0 - 120 MPH
Power	12 / 24 Volt negative ground systems
Water protection	IP67 waterproof
Odometer	Records to 99999.9 miles with power-off memory
Materials	316 stainless steel bezel, ABS housing, convex clear lens
Illumination	Red LED with white dial and red needle

Our Verdict

The W Pro 85mm GPS Speedometer is a solid choice for users who need a compact, waterproof speed and mileage gauge that installs quickly and looks well finished. It offers good value because it includes a GPS sensor, harness and visor, and its odometer memory and durable bezel suit marine and road duty. Buyers wanting networked features or guaranteed long-term durability under extreme use should evaluate fitment and mounting carefully before purchase.

Frequently Asked Questions

Will this speedometer work on both cars and boats?
The unit uses a GPS sensor and supports 12V or 24V negative ground systems, so it works in cars, trucks, motorcycles and most small boats.

Does it keep mileage after power is removed?
Yes, the odometer records to 99999.9 miles and includes an adjustable and power-off memory function to preserve total mileage.

Is a mounting cup included?
No, the package contains the speedometer, GPS sensor, power harness and visor; a separate 85mm gauge mounting cup must be purchased if required.