?50kHz-900MHz Wide Range Frequency?: The si5351 direct output in the 50k-300MHz frequency range provides better than 70dB of dynamics, the extended 300M-600MHz band provides better than 60dB of dynamics, and the 600M-900M band is better than 50dB of dynamics. ?Improved Frequency Algorithm?: The standing wave measuring instrument can use the odd harmonic extension of si5351 to support the measurement frequency up to 900MHz. It allows you to measure S11/S21 parameters directly. If you need to get S12/S22 curve, please exchange the TX/RX port manually. ?USB Antenna Analyzer?: The HF VHF UHF UV VNA antenna analyzer provides perfect vector network measurement capabilities. 2.8 inch LCD TFT Digital display, built-in 400mAh battery ensures above 2 hours working time. Easily charge and control NanoVNA on PC via USB cable. ?Small and Portable, Easy to Use?: The open-hardware NanoVNA bundle aims to provide a RF gadget but useful instrument for enthusiast. The PC control software can export Touchstone (snp) files, which can be used for various radio design and simulation software. ?Perfect DIY Tool?: Without metal shield case, you can directly open the machine to view the circuit structure. It is recommended for learning principles and use at lower frequencies. Ideal for the study of customers who can DIY, tiny and handheld.