Sold for SDR radio programs. Keep it cooler! Works well with SDRSharp, HDSDR, Unitrunker and DSDPlus (FAST LANE) programs and other rtl2832u supported software. This unit is a modified DVB-T USB dongle tuned for Software Designed Radio purposes, including upgraded crystal demodulator, capacitors and inductors to provide a lowered noise floor, increased stability and improved performance.