Overview
HackRF One is an open-source half-duplex SDR designed for radio technology development and experimentation across roughly 1 MHz to 6 GHz.
Use cases
Spectrum exploration, RF protocol research, DSP education, prototyping and SDR software development are natural fits.
Important limitation
HackRF can transmit. RF transmission is regulated, so use shielded labs or frequencies and power levels you are legally authorized to use.