Do it have to be plug in to ur phone?

hi friend, it doesn't need plug to your phone, it has no relation with your phone. Just need plug it to car adaptor or car usb port, it will work directly. When car acc is on, it will be on; when car acc is off, it will be off, all are auto.

tiene que estar conectado todo el tiempo al conector USB?

Hola amigo, sí, la pantalla HUD no tiene batería interna, necesita mantener la conexión a través de USB al puerto USB del automóvil o al adaptador del automóvil.

Is there a big delay in displaying the accurate speed?

hi dear, no delay at all, the HUD can display the accurate speed in real time. If you like, you can contact with me, i can record a video for you, most of our colleagues have one on their own cars, wish you like it also.

Does the mph speed get its reading from the obd2 or from the gps satellites? How about the accurancy?

Hi dear friend, thanks for your kin question, this device is a "GPS Speedometer HUD", it collects all data from satellites free open data. The accuracy is within 5MPH, and it has a "offset" setting, means you can adjust the speed by hand, and make it the same as your dashboard, or more / less than your dashboard and other phone / GPS device / OBD gauge.

3D Head Up Display

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