I contacted Rob Tanzer, owner of Dr. 12 Volt, about a Backup camera for my 26 ft RV. He quoted me $450 out the door for a new system, or an older people user friendly upgrade for $750. I opted for the upgrade. I had to risk sending the money to him to buy it first, then when he came to put it in it was a No brand name Monitor (straight from China) and when he finished installing it was showing me how to operate it, I asked him "What about the Backup camera, that was the main thing I wanted". And he worked, looked for awhile longer and said I'd have to buy a camera, cable and modular and he'd come back to install it. I went ahead and paid for the work he did, and he said he'd send a link for me to buy what was needed to finish up, but never did so I texted and called him to remind him to send the link, several times for a month, no contact. He Ghosted me. I had to get a different company to finish his work and get me a Backup camera for another $400. I checked out his reviews at first and they were 7 good reviews so I went with him. After this experience I've checked deeper and there are several Bad reviews. I will never recommend him, and certainly never pay till the work is completely done to your satisfaction. read more