that is a $6 camera
and the harness that goes into the radio is $20 on ebay
i did mine for under 30$
http://www.ebay.com/itm/Axxess-AX-MAZCAM-Mazda-2011-2015-Vehicles-Back-Up-Camera-Retain-Add-On-Harness-/401113509032?hash=item5d643a6ca8:g:SAEAAOSwcLxYMjpZ&vxp=mtr
Get the 12 volts from rear...