This unit in a 2H 19″ rack enclosure offers 300W of power in the high VHF band (170-225MHz). Unit is rugged and made for 24/7/365 operation. Unit runs from built-in mains power supply. Gives from 5-20km of range depending on antenna location and terrain configuration. High-gain yagi antennas on receiving side can boost range to >30km and more, especially in favourable conditions. In our opinion the best quality/price ratio possible.