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Wireless backup cameras offer an easier upgrade for older vehicles

Drivers can install wireless backup camera systems in older cars to improve reversing safety without professional wiring.

How does a backup camera actually work?
File photo How does a backup camera actually work? Photo: Engadget

Installation methods vary by system

Wired installations require complex labor and can cost upwards of $600. Wireless devices allow owners to perform the installation themselves for a lower price.

Activation triggers depend on design

Most systems turn on automatically when the vehicle shifts into reverse gear. Some units designed for accident monitoring record footage whenever movement appears behind the car.

Price ranges widely online

Add-on wireless cameras are available for purchase with prices ranging from $40 to more than $400. These devices transmit real-time video from the rear of the vehicle to a dashboard monitor.

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