LDMs have been around for a long time. As they evolve so does their complexity. They are able to do more and more calculations. Personally I just need a simple unit that gives me measurements and calculate area and volume. The TLM65 is that unit, it is compact and easily fits into any pocket. I carry it around with almost everywhere. It measures up to 65 feet with a + or – of 1/8″.
It has a simple 2 button operation just hit the on button twice and it will measure. Below that is a button that will calculate area. The unit will automatically shut off when no buttons are pressed. The big LCD screen is not backlit and the unit is power by a AA batteries. Check out the Stanley TLM65 on Amazon. This tool is great estimators, realtors and just about anyone that needs to measure areas up to 65′.