AIM 4300 vector impedance antenna analyzer with the following features: Frequency range 5 kHz to 300 MHz TDR function Plots SWR, Return loss (S11), Resistance and Reactance (Rs, Xs, Rp, and Xp), Zmag, Z-Phase and Circuit Q SO-239 connector Heavy duty case Expansion port for controlling accessories USB interface to the PC Compatible with PCs or tablets running Windows 7 and above Uses internal bandpass filters to reject stray signals (like broadcast stations) that are more than a few KHz from the operating frequency More information is available at https://www.arraysolutions.com/aim-4300 The package includes AIM 4300 analyzer Calibration hardware (open, short and load) 120 VAC wall power supply USB A/Mini B cable 136 page full-color printed manual Weatherproof case The unit is hardly used, works perfectly and is in mint condition. See reviews at https://www.eham.net/reviews/detail/12441 Retail Price is $638 but I am asking $530 shipped and insured. Zelle, PayPal, check and money order accepted. Please wait for confirmation before sending payment. Thanks.