Correct purchase of laser rangefinder

When purchasing a laser rangefinder, several points to consider: 1. Measuring range 2. Measurement accuracy 3. In general, the following points should be paid attention to when using the occasion: a) Only need to measure the distance within a dozen meters, and the accuracy requirement is not high. Recommendations--Ultrasonic rangefinder can be used. Remarks-- The measurement effect of ultrasonic range finder is greatly affected by the environment, and its stability and directivity are worse than those of laser range finder, but the price is relatively cheap! B) The measurement distance is not long, but the relative accuracy requirement is high! Recommendations--The laser rangefinder can be purchased for a short distance. c)The measurement distance is far, mostly used for outdoor use! Recommendations-- Buy telescope laser rangefinder (That is: long-distance laser rangefinder)! Features--It is not only a telescope, but also a rangefinder! With multiple times of observation magnification, users can easily aim at the target for ranging by simply passing through the cross aiming system inside the eyepiece! Using transparent infrared laser emission and reception that is harmless to eyes can accurately measure the target distance, and its size is small, light and easy to carry!