This is a RTL SDR dongle, part number RTL2832U, R820T2. This unit is in excellent condition.
Full information is available here:
https://www.rtl-sdr.com/about-rtl-sdr/
Software (free) is available here:
https://www.rtl-sdr.com/big-list-rtl-sdr-supported-software/
Price: $15
Free shipping to...