GT-3TP Mark-III is Upgraded version of GT-3 Mark-II with Tri-Power: High / Med / Low Power Settings (8W / 4W / 1W). Optimal SQL Setting, Optimal Modulation of TX/RX Power Tube, True 8W Output Power, Up to 11KM effective talking range. 420-450MHz, 144-148MHz.
Broad (Wide) / Narrowband (Narrow), High power / low power (5W / 1W), selectable.