Feature: WHAT IS SOFTWARE DEFINED RADIO (SDR)? In traditional hardware radios, the mathematical operations required to decode and process radio signals are performed using analogue circuitry. Recently, computers have become powerful enough to perform the required mathematical calculations in software, hence the term software defined radio. This has led to advanced radios that previously required complicated analogue hardware now being able to be implemented easily in software.This has reduced the cost of advanced radio capabilities such as wideband tuning and waterfall displays. WHAT IS THE RTL-SDR? The RTL-SDR is an extremely cheap software defined radio which is based on DVB-T TV (Digital HD TV) USB receiver dongles that have the RTL2832U chip in them. Today, by using custom software drivers, a commonly used cheap RTL2832U can then be turned into a sophisticated SDR with features that would have until recently cost in the hundreds to thousands of dollars. Functions: Listening to unencrypted Police/Ambulance/Fire/EMS conversations. Listening to aircraft traffic control conversations. Listening to VHF amateur radio. Tracking and receiving meteorological agency launched weather balloon data. Tracking your own self launched high altitude balloon for payload recovery. Receiving wireless temperature sensors and wireless power meter sensors. Receiving GPS signals and decoding them. Receiving NOAA weather satellite images. Using rtl-sdr on your Android device as a portable radio scanner. Using rtl-sdr as a spectrum analyzer. Use rtl-sdr as a panadapter for your traditional hardware radio. Package Include: 1*00KHz-1.7GHz full band UV HF RTL-SDR USB Tuner Receiver/ R820T+8232 Ham Radio 1*USB cable