This is a product that provides perfect vector network measurement function, small and handheld, with a stand-alone 3.98-inch LCD display, portable built-in 3000mA lithium battery, and a maximum charging current of 2A. The improved frequency algorithm can take advantage of the odd harmonic extension of the SI5351 to support measurement frequencies up to 1.5GHz. The 50K-300MHz frequency range of the si5351's direct output provides 70dB dynamics, the extended 300M-900MHz band provides 60dB dynamics, and the 900M-1.5GHz band provides 40dB dynamics. The default firmware is primarily used for antenna performance measurements. The TX/RX method can measure the full range of S11 and S21 parameters. If you need to get S12 and S22, you will need to manually replace the transceiver port wiring. Using the PC software NanoVNASaver, it can connect to the and extract the data to display on a computer, and save it to a Touchstone file. export Touchstone (snp) files of radio design and simulation software via PC software. The metal shield design reduces external interference and improves the measurement accuracy. How to do it: Measurement frequency:10KHz-1.5GHz RF Output:0dBm (2dBm) Measurement range:70dB (50kHz-300MHz), 60dB (300M-900MHz), 40dB (0.9G-1.5GHz)); When harmonic measurements are used, nonlinear transformations of the fundamental waves can introduce errors. Port SWR:Less than 1.1 Display:3.98-inch TFT (320 x 480) USB interface:USB type-C communication mode: CDC (serial port) Power supply:USB 5V 200mA, built-in 3000mAh battery, maximum charging current 2A Number of scan points:up to 401 (optional), unlimited when connected to a PC Show Tracks:4, Markers:8, Settings Save:7 Frequency tolerance:Less than 2.5ppm Frequency stabili:Less than 0.5ppm Colour:Green Material:plastic+metal Package Contents: 1 * Vector Network Analyzer Set Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.