Channel Master CM-7778 Titan2 VHF/UHF Preamplifier with Power Supply Specifications: Model 0747 (power supply) is included, output voltage is +18 VDC, UL and cUL listed Number of Inputs: 1 Impedance: Input - 75 Ohm, Download - 75 Ohm Connectors (Input and Output): Type F VHF -Gain: 16 dB -Noise Figure: 3.0 dB -Output Capability: 56 dBmV UHF -Gain: 23 dB -Noise Figure: 2.2 dB -Output Capability: 50 dBmV