What's the definition of a 'Plrf10'? If I don't know what that acronym represents, there must be others that don't have a clue also...
Pocket Laser Range Finder......
The Vectronix PLRF is a laser range finder, pure and simple! It measures
the distance to terrain features and objects, with an accuracy of 2 m, from
a minimum of 5 m out to about 2 km. Small enough to fit into a uniform
pocket, the PLRF is water-proof and functions reliably in harsh
environments, from steamy jungles to icy mountains. Easy to operate
using just one hand, it is ideal for the clutter of the urban terrain. The
PLRF Pocket Laser Range Finder exists in two versions, PLRF10 or PLRF15.
The difference between the two lies in their laser diodes, beam
divergence, and the fact that the 1550 nm wavelength of the PLRF15 is
invisible to current image intensification devices. Both versions have the
same black aluminium housing covered by a removable, shock-absorbing
rubber, and the 6 × optics with a black, graduated reticle.
http://www.vectronix.us/#/us/products/handhelds/small_lightweight/plrf10
link added