Sound like fun!forbes.com said:It can both read and transmit signals from 100 megaherz to 6 gigaherz, including frequencies as low as the range used by FM radio up to the gigaherz frequencies used by Wifi or experimental wireless protocols for cars communicating in traffic.
DARPA-Funded Radio HackRF Aims To Be A $300 Wireless Swiss Army Knife For Hackers - Forbes