wiiyii HUD G4S GPS Head-Up Display Digital Speedometer 3" Screen — Auto On/Off, Brightness Control

wiiyii HUD G4S is a plug-and-play GPS head-up display that projects real-time speed, direction and vehicle data onto a clear 3" screen so you can keep your eyes on the road.

The wiiyii HUD G4S is a compact digital speedometer designed to bring critical driving information into the driver's line of sight. Using an internal GPS module, the unit shows speed, heading, satellite count and additional telemetry on a green-on-black display that reduces glare. It connects to power via USB, supports both km/h and mph, and powers up or down with the vehicle ignition for convenience and battery protection.

How does the HUD G4S keep me focused while driving?

The HUD places essential metrics within your forward view so you don’t need to look down at the dash. A large, high-contrast green font improves legibility in day and night conditions, lowering distraction. Auto and manual brightness controls help avoid glare while maintaining readability.

• 3" display with high-contrast green characters for easier scanning
• Projects speed, direction and satellite count in the same view
• Automatic brightness adjustment plus manual override
• Starts and stops with vehicle ignition to prevent battery drain

What driving data does this digital speedometer show?

The G4S reads GPS signals to present accurate speed and heading, and it reports satellite reception quality. In addition, it includes configurable alerts like speeding reminders and a fatigue driving prompt to help you stay aware. It can also run a timed 0–100 km/h acceleration test and track trip distance for performance checks.

• Instant vehicle speed with switchable km/h or mph
• Driving direction (compass/heading) and number of satellites
• Speeding alarm and fatigue driving reminder
• 0–100 km/h acceleration and trip distance test functions

Will the HUD work with any car and how does installation look?

The wiiyii HUD G4S is GPS-based and independent of your vehicle’s CAN bus, so it works across cars, trucks and SUVs. Installation is straightforward: connect the included USB power cable and mount the unit on the dash. No complex wiring or professional installation is required.

• USB-powered plug-and-play setup, no vehicle-specific wiring
• Compatible with a wide range of vehicles thanks to GPS operation
• Auto power on/off synchronized with ignition
• Compact footprint fits most dashboards without obstructing view

How reliable and safe is the unit for daily driving?

The G4S carries CE, FCC and RoHS certifications, reflecting compliance with common safety and emissions standards. The GPS-derived speed readings are independent of wheel slip and odometer errors, providing a reliable reference alongside your vehicle instruments. Green-lit characters are chosen to reduce eye strain during prolonged drives.

• Certified to CE, FCC and RoHS standards for electrical safety
• GPS-based speed measurement for consistent accuracy
• Green display for reduced eye fatigue on long trips
• Battery-protecting auto shutoff to avoid parasitic drain

Who is this for: The wiiyii HUD G4S suits drivers who want a clearer, safer way to monitor speed and basic vehicle data without glancing down—commuters, long-distance drivers, performance testers and owners of older cars without modern instrument clusters will all find it useful. If you need a compact, certified, easy-to-install head-up display that emphasizes visibility and practical alerts, the G4S is built for that purpose.