Is the voice transmitter of Huaning centralized control in coal mine Wu Xiao Electric?

Belong to. Five small electrical appliances in coal mines refer to five kinds of electrical equipment, such as control buttons, lamps, detonators, junction boxes and communication devices. Five small appliances have a characteristic, that is, the electrical (or electrical) voltage must be 127V and below, except for the junction box, which belongs to five small appliances regardless of the voltage level.