The Speedhut 4″ 200km/h GPS Speedometer/10K Tachometer Gauge (R4-DS18-REV) delivers accurate, real-time vehicle data using advanced GPS technology for speed and an integrated tachometer for engine RPM monitoring. Designed for metric-readout users, this dual-function gauge offers a maximum speed reading of 200 km/h and supports RPM tracking up to 10,000. Installation is simplified by requiring only a 12V power supply and the included waterproof GPS antenna—no calibration needed for tire size or gear ratios. The tachometer works with virtually any engine providing a tach signal over one volt, from 1/2 to 6 pulses per revolution. Built to withstand rigorous conditions, this gauge ensures dependable operation for performance or daily driving, making it a reliable companion for any vehicle enthusiast.
KEY FEATURES AND BENEFITS:
- GPS-based accuracy: Offers consistent speed readings up to 200 km/h without traditional sensors.
- Dual functionality: Combines a speedometer and tachometer into one space-efficient 4″ gauge.
- Universal tachometer compatibility: Supports 1/2 to 6 pulses per revolution for engines with tach signals over 1V.
- Easy installation: Requires only 12V power and included GPS antenna—no drivetrain connections needed.
- No calibration required: Speed readings remain accurate regardless of tire size or gear ratio changes.
- Free GPS signal usage: Operates globally without subscription or data transmission.
- Lifetime electronic warranty: Offers long-term confidence in product quality.
- Made in the USA: Engineered and manufactured with American craftsmanship.
SPECIFICATIONS:
- Gauge Type: Dual GPS Speedometer and Tachometer
- Speedometer Range: 0-200 km/h
- Tachometer Range: 0-10K RPM
- Gauge Size: 4 inches (diameter)
- Mounting Hole Size: 3.93 inches (100mm)
- Units: Metric
- Speedometer Technology: GPS-based
- Tachometer Compatibility: Works with any engine and tach signal over 1 volt, 1/2 to 6 pulses per revolution
- Power Requirement: 12V
- Included:
- 8 ft Tachometer Harness (1 Wire 2 Pin Connector)
- 3 ft Power & Lighting Harness
- GPS Antenna with 9.8 ft cable and male SMA connector
- Bezel Material: Solid billet aluminum
HOW TO USE:
- Mount the Gauge: Secure the 4″ Speedhut dual gauge into a 3.93″ (100mm) diameter hole using the spin-lock ring.
- Connect the Power Harness: Attach the 3 ft Power & Lighting Harness to a 12V ignition-switched power source. Ground properly.
- Connect the Tachometer Harness: Wire the 8 ft Tachometer Harness to the tach signal from your ignition or ECU.
- Mount the GPS Antenna: Install in a location with an unobstructed view of the sky—can be internal or external.
- Connect the GPS Antenna: Plug the SMA connector into the GPS port on the back of the gauge.
- Power On: Turn on the vehicle’s ignition to power the gauge and acquire a GPS signal.
- Monitor Readings: View live speed and RPM data without needing further calibration.
BENEFITS OF USING THE SPEEDHUT 4″ 200KM/H GPS SPEEDOMETER/10K TACHOMETER GAUGE (R4-DS18-REV):
- Precision monitoring: GPS eliminates traditional inaccuracies from mechanical sensors or drivetrain variations.
- Quick setup: Simple plug-and-play system with minimal wiring and no calibration requirements.
- Global GPS functionality: Works worldwide with free, subscription-free GPS signals.
- Engine compatibility: Works with a variety of engines and tach signal types.
- Built to endure: Solid billet aluminum bezel and weather-resistant design ensure durability.
- Peace of mind: Lifetime warranty on electronics guarantees long-term reliability.
- High-quality design: Proudly made in the USA for dependable performance and aesthetics.
FEATURES:
- Satellite-based speed tracking for pinpoint accuracy, regardless of tire size or modifications.
- Broad compatibility with any engine producing a tach signal over one volt.
- Effortless mounting with a slim gauge case and user-friendly spin-lock mechanism.
- Durable and stylish solid billet aluminum bezel.
- Robust construction to withstand various environmental elements.
- Backed by a limited lifetime guarantee, reflecting the product’s reliability.
- Manufactured in the USA, adhering to high standards of quality and craftsmanship.









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