MM wrote:

That is listed on Amazon as a Bosch DLE 40 Professional Laser
Rangefinder. Whereas the Bosch *GLM* 40 is described as a Digital
Laser Measure, which is I believe what I need. What's the difference
between rangefinder and measure?

Dunno why Amazon call it a rangefinder, but Bosch call it a measure.

http://www.bosch-pt.com.ph/ph/en/laser-measure-dle-40-131500-0601016370.html

It uses a spot beam so you can see what you're measuring and I've seen a
teardown of it that demonstrates that it uses phase modulation of the
reflected beam to do the measuring.