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https://www.tobem.com/cyberwar/nooelec-nesdr-smart-xtr-sdr-premium-rtl-sdr-w-extended-tuning-range-aluminum-enclosure-0-5ppm-tcxo-sma-input-rtl2832u-e4000-based-software-defined-radio/
NooElec NESDR SMArt XTR SDR - Premium RTL-SDR w/ Extended Tuning Range, Aluminum Enclosure, 0.5PPM TCXO, SMA Input. RTL2832U & E4000-Based Software Defined Radio