Using a pair of iPod/apple devices to monitor your level indicator. I use an old iPod 4 and a new iPod 5 for this tip:
Leveler tool is located inside the front door panel.
Install the BlueCam free app to both devices, use Bluetooth to pair up the devices, I use the iPod 4 as the remote camera and iPod 5 for monitor
This is what I see on my iPod 5 monitor while leveling the rig, this bubble was for the side to side leveling. I just move the remote camera to point to the bubble you are leveling.
This makes it so easy to level the trailer when you go solo. Before I was checking the leveler like a million times when I was using the Bal leveler and the tire was on the opposite side...frustration almost kicked in but I kept my cool...now problem solved
I tried using this method for monitoring the rear while backing up but I find it too confusing but I should use it when I'm by myself to monitor how close the rig's bumpers is to the rear wall or trees.
This works great with two people because it doubles as a voice monitor. The guide person does not have to shout or be seen, say your command and point the camera for the driver to see. The driver could also ask questions to the guide.
I love my gadgets...lol