RTL-SDR is a cheap software defined radio that uses a DVB-T TV tuner dongle based on the RTL2832U chipset and R820T2 tuner.
SDR receiver usb c instead of usb plug : r/RTLSDR
AIS Decoding with an RTL-SDR Blog v3 Dongle
Software Defined Radio Rtl Sdr V3 Usb Dongle at Rs 9000/piece
RTL-SDR Software Defined Radio Receiver USB Stick
Software Defined Radio (RTL-SDR) USB Dongle
RTL-SDR Blog V4 Dongle Initial Release!
RTL-SDR - Hacker Warehouse
Buy NooElec NESDR Mini 2+0.5PPM TCXO USB RTL-SDR Receiver (RTL2832
100KHz-1.7GHz Full Band HF RTL-SDR USB Tuner Receiver/ R820T+8232
Listening to FM using RTL-SDR and GQRX
RTL2832u RTL SDR Receiver R820t2 USB RTL-SDR Dongle with 0.5ppm