will this camera work as a standalone unit or does it need to be connected to a front mounted camera?

Hello! It needs to be connected to our main unit to function. Thank you!

Questions & Answers: Vantrue E2 1944P Adjustable Rear Camera, 160° Wide Angle View, Night Vision, WDR, Fit for Most Car, Pickup, Truck, SUV, Minivan, Sedans

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Vantrue E2 1944P Adjustable Rear Camera, 160° Wide Angle View, Night Vision, WDR, Fit for Most Car, Pickup, Truck, SUV, Minivan, Sedans

For Vantrue E2 Dash Cam Compatible with Vantrue E2 front-facing camera to have back viewing recording capabilities. Providing your car with all-around protection.
1944P Rear Camera &160°Wide Angle The rear camera capturing a four-lane view at a 160° angle, as well as detecting motion occurring behind the vehicle. It ensures a wide field of view and a clear, detailed picture for safe driving during the day and night thanks to the sony starvis sensor.
Easy to Install Simply connect the rearview camera to the E2 front view camera. The adjustable design allows adjusting the camera to a position that's best for you.
Suitable for most Cars The rear camera is designed for most of the vehicles, such as cars, SUVs, Pickup, trucks, Jeeps Minivan, and Sedans.