wiiyii G4S GPS Head-Up Display HUD for Cars Truck — Green 3" Screen, Real-Time MPH/KPH & Voltage

The wiiyii G4S is a plug-and-play GPS head-up display that projects your speed, direction, voltage and driving data on a green 3" screen so you can keep your eyes on the road.

Designed for universal fit in cars, trucks and hybrids, the G4S HUD uses satellite GPS to show real-time speed in either MPH or KPH, plus direction, satellite count and vehicle voltage. Its auto power-on/off and adjustable brightness make it practical for daily commutes and long trips, while the green text aims to reduce eye strain.

How will this HUD help me drive more safely?

The G4S projects key driving metrics into your line of sight so you don't need to glance down at your dashboard. Reduced head movement lets you react faster to road events and keeps attention centered forward. It also offers audible and visual speeding alerts to remind you when you exceed preset limits.

• Heads-up projection keeps speed in your eyeline.
• Speeding alarm configurable in MPH or KPH.
• Auto brightness and green display reduce glare at night.
• Displays satellite count and driving direction for situational awareness.

What data does the wiiyii G4S show, and how accurate is it?

The device is GPS-based, so speed and distance readings come from satellite signals rather than vehicle sensors, providing consistent accuracy across makes and models. It also shows battery voltage, compass heading and the number of connected satellites, useful for diagnostics and route awareness.

• Real-time vehicle speed from GPS satellites.
• Voltage readout for basic electrical monitoring.
• Compass heading (driving direction) display.
• Satellite count to indicate signal quality.

Does it work with my car, and how is it installed?

The G4S is universal: it runs on its internal GPS module and draws power via a USB cable, so installation is plug-and-play. Place the unit on your dashboard, plug into a 5V USB power source, and it will power on or off automatically with the vehicle ignition.

• Works with gasoline, diesel, hybrid and electric vehicles.
• USB-powered — connect to dash USB or adapter.
• Auto on/off tied to vehicle power to protect battery.
• Manual and automatic brightness controls included.

How does the display protect my eyes during long drives?

The G4S uses a green backlit display with large numerals to improve legibility and reduce visual strain compared with high-contrast white or blue displays. Adjustable brightness and a night mode reduce glare on dark roads while keeping information readable.

• Green eye-protection display color for comfortable viewing.
• Large fonts improve visibility at a glance.
• Automatic and manual brightness settings prevent glare.
• Compact 3-inch screen designed for minimal distraction.

Who is this for: the wiiyii G4S HUD is aimed at drivers who want an easy-to-install, vehicle-agnostic way to keep crucial driving data in their line of sight—commuters, delivery drivers, long-distance travelers and owners of older cars without modern digital displays. It’s also a practical choice for anyone who prefers GPS-based speed readouts or needs a simple voltage and satellite-status tool without wiring into the vehicle’s systems.