What types of rangefinders are there?

There are two types of rangefinders, one is a handheld rangefinder and the other is a telescope rangefinder.

The method of using the handheld rangefinder is: when I want to measure another target, I first shoot infrared rays, aim at the measurement target, press the measurement button of the machine, and the data will be available within 1 second. appears on the instrument's screen.

The method of using the telescopic rangefinder is: hold the telescope in hand, point one eye to the eyepiece, there is a small circle with a cross inside the eyepiece, take this small circle as the middle point, aim at the target point we want to measure, press Press the measurement button and the data is displayed in the eyepiece.