Upgraded R820T2 tuner chip. Various comparisons on the web have concluded that the R820T2 tuner has better performance over the original R820T, including more sensitivity and lower noise floor. Results may vary depending on your application and local conditions.
Nooelec RTL-SDR v5 SDR - NESDR Smart HF/VHF/UHF (100kHz-1.75GHz) Software Defined Radio. Premium RTLSDR w/ 0.5PPM TCXO, SMA Input & Aluminum Enclosure. RTL2832U & R820T2 (R860)-Based Radio : Electronics
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RTL-SDR Blog RTL SDR V3 R820T2 RTL2832U 1PPM TCXO SMA RTLSDR Software – OzHack