A:Answer I purchased the "wireless" model, but the monitor plugged into the 12-volt plug, & the camera was spliced to the reverse light wire to power the camera. The wireless component was from the camera to the monitor. The Best Buy installer was quick & efficient; although I consider myself a do-it- yourself individual, but after observing the installation, I was glad I didn't attempt it this time since the installation was a bit involved and didn't cost me anything extra; my Total Tech Support Subscription covered it.