wiiyii G4S HUD GPS Speedometer — 3" Green Display, MPH/KPH, Auto Brightness

The wiiyii G4S is a compact HUD GPS speedometer that projects your vehicle speed, direction and key driving data onto a clear 3" display so you can keep your eyes on the road.

The wiiyii G4S Digital GPS Speedometer is a plug-and-play head-up display designed to give drivers instant, glanceable driving information without looking down at the dashboard. Using its built-in GPS sensor and a 3-inch screen with green eye‑friendly font, the device reports speed (MPH/KPH), heading, satellite count, battery voltage and customizable alerts. It suits petrol, diesel, hybrid and electric vehicles and automatically powers on or off with ignition to conserve battery life.

How does the G4S improve visibility and reduce distraction?

The G4S projects large green numerals on its screen that are readable in bright and low-light conditions, helping drivers check speed without diverting attention from the road. The color and font are chosen for reduced eye strain during long drives. Auto/manual brightness modes prevent glare and allow comfortable viewing for different light conditions.

• 3-inch display with large green characters for quick glances
• Auto-brightness and manual adjustment to prevent glare
• Green-eye protection design for reduced fatigue on long trips
• Clear MPH/KPH toggle to match local units

What driving metrics and alerts does it show?

The G4S supplies essential GPS-based metrics including real-time speed, driving direction (heading), satellite count and vehicle voltage. It also features configurable alerts like speeding alarms and fatigue driving reminders to prompt safer behavior without suggesting specific medical or safety claims. One-button switching makes changing readouts fast and simple.

• Real-time GPS speed in MPH or KPH with high precision
• Driving heading and satellite count for GPS status checks
• Speeding alarm and fatigue driving reminder options
• One-click display layout switching for quick configuration

How easy is installation and compatibility with my vehicle?

Installation is simple: connect the G4S to a 5V USB power source and position the unit on your dashboard. Because speed data comes from its internal GPS receiver, it works independently of vehicle make or model. The device supports automatic power on/off with ignition to help avoid battery drain.

• USB-powered plug-and-play setup — no OBD required
• GPS-based data works in cars, trucks, hybrids and EVs
• Auto start/stop tied to vehicle power to protect battery
• Compact design fits most dashboards and windscreen views

Is the G4S reliable and certified for quality?

The G4S is manufactured to meet CE, FCC and RoHS standards and includes features for vehicle testing like 0–100 km/h acceleration and distance measurement. While not a diagnostic tool, its GPS speed and distance readings are accurate for everyday speed monitoring and performance checks. For specific product questions or service, wiiyii customer support is available through the seller page.

• CE, FCC and RoHS certifications for regulatory compliance
• 0–100 km/h acceleration and distance testing functions
• Customer support contact available via the merchant page
• Robust GPS module for precise speed readings

Who is this for? The wiiyii G4S HUD is ideal for drivers who want a low‑profile, reliable way to monitor speed and essential driving data without taking their eyes off the road. It fits daily commuters, long-distance drivers, fleet operators and owners of petrol, diesel, hybrid or electric vehicles who prefer an easy-to-install, GPS-based head-up solution with adjustable brightness and straightforward alerts.