Multi-mode switchable operation. Has remote DC output for preamps etc. Has overvoltage and reverse polarity protection. Uses 2 MRF-492 power transistors in the output for 100watts. Capable of 120watts max but should stay at 100watts max. 2 watts in will give 50 watts out at 13Volts. 8 watts in will give 100watts out at 13Volts. If you have an input power greater than this, then you will need to adjust the input resistors. This unit can be run over a wide range of voltages with 15Volts giving 120Watts with 8Watts in. Documentation includes circuit and board layout.