TYT TH-UVF8D Dual Band 136-174/400-520 MHz 128CH Radio VHF136-174/UHF400-520MHz FM transceiver with scrambler High/low TX power selectable battery power voltage power-on message repeater offset function channel VFO step function emergency alarm busy channel lock-out(BCLO) transmitter time-out timer(TOT) voice frequency range: 136-174 / 400-520mhz 128 channels storage 8 groups of voice scrambler FM radio