Traditional Culture Encyclopedia - Weather inquiry - What is the little black box in the hands of the meteorologist of the Central Meteorological Observatory?

What is the little black box in the hands of the meteorologist of the Central Meteorological Observatory?

remote control

Sometimes, when they click on a place on the map of China, some symbols will appear, such as rainstorm and rainstorm, which is the purpose of adjusting this tone and that tone.

Another guess is that they can't remember all the words when they play, so they change pages.