LINEAR POWER RF AMPLIFIER, OPHIR Model Number: 5135E, Quantity of Five (5), 800-2000 MHz, 300 W Front panel controller, digital display, forward and reverse power readings, gain adjustment, ALC on/off... LINEAR POWER RF AMPLIFIER, OPHIR Model Number: 5135E, Quantity of Five (5), 800-2000 MHz, 300 W Front panel controller, digital display, forward and reverse power readings, gain adjustment, ALC on/off, fault indication, standby mode, and rear panel IEEE-488 GPIB, RS-232, and Ethernet Interface communication, inclusive. Warranty of 5 years for parts and labor, included.