This transceiver has genuine OEM options installed and these are the CTCSS Tone boards.This transceiver uses 2 CTN5200. 1st jpeg - reception on 144Mhz, 4th - TSQL freq on 144Mhz, 5th - TSQL freq on 430Mhz, 7th - full reception on 144Mhz, 8th - full reception on 430Mhz.
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