POWERCITY - 221615 KONIG FM TRANSMITTER WITH REMOTE .Product Information: konig fm in-car transmitter. connect a smartphone or mp3. player with the 3.5mm stereo. headphone mini jack cable to. play your music via.fm modulator for coal,Medium-Frequency Propagation in Coal Mines - CDCMedium-frequency (MF) waves can propagate in a coal seam, bounded . MF wireless radio satisfies communication needs similar to those ... Modulation. SSB.
fm modulator for coal