So as there are millions more cars on the road now then when our family's pie company first purchased our 1914 pie truck and other vehicles and folks around the D.C. area only know one hand signal I installed a hidden Wi-Fi camera for rearview via my iphone suction cupped to the front windshield. IT WoRKS Great! and as it can be hidden in seconds so folks wont know my t is not OEM! all for about $100 bucks. DO it yourself
http://www.dhgate.com/store/product/newest-waterproof-wifi-backup-camera-support/168401672.html A life saver!