Cassini HUD — Wireless Heads-Up Speed Display
Green / USB
$44.99
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Cassini HUD — Wireless Heads-Up Speed Display
$44.99
Free US shipping · Ships in 1–3 days · 30-day returns
✓ Ships from our US warehouse
✓ 30-day money-back guarantee
✓ No wiring or installation required
Looking down costs you more than you think.
Every glance at your dashboard is a moment your eyes leave the road. At 70 mph, two seconds is over 200 feet you never saw. Most speedometers sit low, behind the wheel, out of your natural line of sight. Cassini moves it up.
01
Plug it in
Connect to any USB port in your car. That's the entire installation. No wiring, no adapter, no trip to a mechanic.
02
It finds itself
Built-in GPS locks on and calibrates automatically. No app to download, no account to create, no pairing.
03
Drive
Your speed sits in your line of sight — bright in daylight, dimmed automatically at night.
No OBD2 required
Runs on GPS, not your car's diagnostic port. Works in gas, hybrid, and electric vehicles.
Auto-dimming display
Readable in direct sunlight, dimmed automatically after dark so it never distracts.
2.5 inches, 6 ounces
Small enough to sit on the dash without blocking anything in your view.
MPH or KM/H
Switch units with a single press.
Moves between cars
Takes ten seconds to unplug and move. Perfect for rentals and shared vehicles.
No app, no subscription
It's a device, not a service. Plug it in and it works.
Long commutes
Stop dropping your eyes every thirty seconds on the same stretch of highway.
Older cars
A modern readout without touching your dashboard or wiring anything.
Rideshare and delivery
Twelve-hour shifts are easier when the number you need is already in front of you.
Rentals and shared cars
Ten seconds to move. No permanent install, nothing to undo.
Why not just look down?
| Cassini | Factory speedometer | |
|---|---|---|
| Position | In your line of sight | Below the wheel |
| Eyes off road | None | Every glance |
| Night visibility | Auto-dimmed | Fixed brightness |
| Install time | 10 seconds | — |
| Works in any car | Yes, any USB port | — |
Will it work in my car?
If your car has a USB port, yes. Cassini runs on built-in GPS rather than your car's diagnostic port, so it doesn't depend on make, model, or year. Works in gas, hybrid, and electric vehicles. No USB port? Any standard 12V USB adapter will do.
Do I need to install anything?
No wiring, no adapter, no app, no account. Plug it into USB and it calibrates itself.
Is it accurate?
Cassini reads your speed from GPS satellites — the same source your phone's navigation uses. GPS speed is often closer to your true speed than a factory speedometer, which is calibrated for stock tire sizes.
Will it be readable in daylight?
Yes. The display is built for direct sun and dims automatically after dark.
Does it drain my battery?
No. It draws power only while your car is running, the same as charging a phone.
How long does shipping take?
Orders ship from our US warehouse within 1–3 business days and arrive in 3–8 business days. You'll get a tracking number by email as soon as it ships.
What if I don't like it?
Send it back within 30 days for a full refund. No restocking fee.
30 days to change your mind.
Try Cassini on your daily drive. If it's not for you, email us within 30 days and we'll refund you in full. If it arrives damaged or doesn't work, we cover return shipping too.