Usmile USB 100KHz-1.7GHz VHF UHF Band RTL SDR+UpConverter SDR Receiver NFM FM DSB LSB CW sdr Radio Built-in 100Mhz upconverter combined with Built-in HD R820T allow better receiving of short wave than using direct SDRs Q tunnel A DBM Balanced ring mixer can reduce the short-wave noise and offer a larger dynamic range. This receiver can eliminate the aliasing caused by direct sampling. Using software to decode Simulated subsonic and digital subsonic Automatic search and scan,Can not be used to receive HF signal band Use software to obtain the ID of an digital 2-way radio and audio signal. Better used with this antenna www.amazon.com/dp/B0141X3B5W