Here is an interesting item available from our friends at the Sharper Image Catalog. They always had the latest gadget back in the eighties, and they are still around. This is the Rearview Bike Camera.
I’m sure that you can see the purpose of the Rearview Bike Camera, as most bikes don’t come with rear or side-view mirrors, which are standard on most automobiles. It really is hard to look behind you on a bike without occasionally losing your balance or taking your eyes off the road.
The Rearview Bike Camera has a camera that fits on the back and under the seat, and it even has 10 flashing red LEDS that will turn on in low light. It has an LCD viewing screen so you can see what is behind you, which I can only assume is wirelessly synced.
It can work on 10+ hours on a full charge. It costs about $179.99 that you can get here, so you might want to remove it from your bike if you are parking for a while.