Can I use a reversing camera with your units/do you sell reversing cameras?

All our units (portable and in dash) have the facility to take a reverse camera. We have a basic reverse camera (http://www.vms4x4.com/collections/accessories/products/universal-ve...) and we even offer a dual camera kit for car and caravan/trailer (http://www.vms4x4.com/collections/accessories/products/vms-dual-cam...).
Both of the above models will work in any of our units.