Dash Cams with a Wireless Backup Camera

Usually it provides a live reversing view, not continuous evidence recording. Confirm recording and loop-recording support in the manual.

Yes. Wireless normally describes video transmission; the rear camera still needs a wired power source.

Range depends on vehicle length, metal bodywork and interference. Use the maker's stated range and vehicle-compatibility guidance.

Some monitors accept both feeds or offer split view, but this is model-specific. Check inputs, switching behaviour and recording channels.