Updated Nanovna Analyzer: Seesii Nanovna-H4 Vector Network Analyzer is manufactured by Hugen. Comes with the latest version 4.3, measuring range 10Khz-1.5Ghz, 4.0 inch LCD touch screen. This antenna analyzer has an outstanding vector network measurement function and is perfect for evaluating antenna resonance and SWR. It is a very practical and intelligent analyzer for electronic engineers, amateur radio operators or radio amateurs Micro SD Port and Time Display: The latest antenna analyzer equipped with a MicroSD card port so that you can save the field test data to the MicroSD card at any time. Supports memory card up to 32GB (not included). In addition, unlike Previous version of Nanovna, date and time can be customized, which is convenient for recording and saving data. Improved frequency algorithm: The vector network analyzer can use the old harmonic expansion of Si5351 and support the measurement frequency up to 1.5Ghz. The 50K-300Mhz frequency range of the Si5351 direct output has a dynamic range greater than 70Db, the 300M-900Mhz extended band has a dynamic range greater than 60Db And 900M-1.5Ghz Band Provides Dynamic Range Greater Than 40Db. It Is Excellent For Troubleshooting Antennas And Improving Performance. PC Connection: The VNA Analyzer Uses Nanovnasaver PC Software And Can Connect To Nanovna And Extract Data To Display On The Computer To Save In Touchstone Files. You Can Export Touchstone Files (Snp) For Various Radio Design And Simulation Software Via PC Software. In Addition, The Default Firmware Is Mainly Used To Measure Antenna Performance.