RangeSWR usable measurement range of this analyzer is 1.0 to 9.99. step size: user configurable increments of 100Hz, 1KHz, 10KHz, and 100KHz 12 to 14V 500mAPowered by DC 12 to 14V 500mA external power with 2.1mm power jack(center pin positive), just connect the power and then work 5 operation buttons5 operation buttons are easy and convenient to operate. You can selects operation mode, band and extended functions Beautiful and simple designBeautiful and simple designed black case would protect the antenna analyzer from external damage GreatThis would be a great SWR antenna analyzer for ham hobbyist or professionals 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 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" Operation Button Function: Mode: Selects operation mode, impedance(default), complex impedance, capacitance, and inductance BAND: Select band from any of the available bands, 160M to 6M CONFIG: Provides menu for configurations and extended functions, PC Link, step size setting, suspend timeout setting, calibration, and software upgrade SCAN: Pressing this control initiates a scan of frequencies of the selected BAND. Scan exits to impedance mode showing the 2:1 bandwidth and the resonant point o the antenna CAN(up): Increase frequency and used to cancel operation for CONFIG menu VAL(down): Decrease frequency and used to validate operation for CONFIG menu Package Includes: 1 x Analyzer(Power supply is not included)