Instead of guessing as to whether or not your RV is level, pick up this Electronic Leveler from CIPA and get it right the first time! Simply place the Leveler base as close to the center of your RV as possible with the green arrow pointed toward the front of the vehicle, then pull off the hand-held module for accurate readings. Hand-held displays red or green lights over each corner of the RV... red equals "not level", while green means you're all set. Use the RV's leveling system to adjust the height until all greens appear, making your rig safe and sound. Compact "fit-in-your-hand" size is perfect for easy storage between uses!

CIPA-USA 3000 RV Electronic Leveler