In addition, if you are using a transmitter which is selectable between different power levels, it is generally not optimized for the lower power level. It will draw more current, and therefore not last as long, as a device designed for one power level. We don't mean a laser beam. It should be a relatively wide opening. If you need to transmit through trees, foliage, or narrow openings, this is not line of sight.
All microwave systems are line of sight.
That means the RF signal can get through smaller openings than your two way radio. However, the further apart, generally the better the performance. Part of this benefit is due to the ability to avoid blockage of the signal by a single object, such as a car driving by. 5. I already have a lot of transmitters and cameras. The deviation of the transmitter and receiver is matched.