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Cameras that send an image to a dashboard-mounted screen when you shift into reverse are increasingly common on new cars, but since they are often bundled with navigation systems, they can add $2,000 or more to the price. Less-expensive aftermarket systems can be tricky to install, since most require wires from the license plate to the dashboard.
Now there's a promising alternative: The VR3 VRBCS300W, from Virtual Reality Video Labs, uses a wireless transmitter activated by the backup lights. It's priced at $149, and we've seen it for less than $100.
We found the VR3 relatively easy to install and effective enough to be an ...