Complex sentence: It transmits on two longwave frequencies, on 153 kHz with 300 kW and on 261 kHz with a power of 2500 kW, the latter is the most powerful broadcasting station in the world.
Split into simpler sentences: It transmits on two longwave frequencies, on 153 kHz with 300 kW and on 261 kHz with a power of 2500 kW. Latter is the most powerful broadcasting station in the world.