Description: This is a SWR analyzer for ham hobbyists. With 5 buttons, "Mode", "Band", "Config", "Scan", "Up", "Down", you can selects operation mode, band and extended functions. It is powered by DC 12 to 14V 500mA external power with 2.1mm power jack, and can be used to measure antenna electrical parameters, SWR, impedance (resistance + reactance), capacitance, inductance, feed-point impedance, ground loss, etc. Specifications: Frequency Generation & Control: 1 - 60 Mhz Source Impedance: 50 Ohms Stability: +/- 100 ppm Spectral Purity: Harmonics down >- TBD dB beyond 60 MHz Step Size: User configurable increments of 100 Hz, 1 kHz, 10 kHz, and 100 kHz SWR Usable Measurement Range: 1.0 to 9.99 Impedance: Approx. 5 to 2000 ohms RF Output: Adjustable 2.0 Volts pp (typ) Power Supply: Powered by external 12 to 14V DC, 500mA Push Buttons (5): "Mode", "Band", "Config", "Scan", "Up", "Down" Switch: "Power On" Connectors: RF USB: Mini-B receptacle External Power: 2.1mm Power Jack (center pin positive) Size: 150 x 90 x 40mm / 5.9 x 3.54 x 1.57"