zdaje się że to trochę lepszy RTL-SDR 
Frequency stability is +/- 5ppm and the minimum scanning step is 2kHz at 1MHz span. Resolution bandwidths can be set to 50kHz, 100kHz, 200kHz, or 500kHz.
Frequency stability is +/- 5ppm and the minimum scanning step is 2kHz at 1MHz span. Resolution bandwidths can be set to 50kHz, 100kHz, 200kHz, or 500kHz.