Interesting. Our 2007 has the same brand camera. So far so good.But we loose sound at times. I thought it was an intermittent failure but concluded we loose sound only when driving in the rain. I think water covers over the outdoor rear microphone. When it's dry outside, all is well again.
neither my 2010/2350 or my 2012/2552 Sony camera backup system offered sound.
Ron Dittmer, I am so glad you sold me on Phoenix Cruiser 5 years ago. Don Keller was happy as well.