The FN-U-K1L1-24108-XXK5 from ETL Systems is a Block Upconverter with AC Voltage 85 to 264 VAC, Gain 0 to 30 dB, Gain Flatness ±0.3 to 1.5 dB, Image Rejection 60 dB, Impedance 50 Ohms. Tags: Rack Mount. More details for FN-U-K1L1-24108-XXK5 can be seen below.