KiwiSDR is a software-defined radio that covers shortwave and longwave signals, AM broadcast bands, utility stations, and amateur radio transmissions in the spectrum from 10 kHz to 30 MHz. It features a custom circuit board that connects to the Beaglebone Green or Beaglebone Black—all you need to supply is an antenna (included), power supply, and network connection and you can listen from anywhere in the world. Like all Seeed products, it’s 100-percent open source and ready for customization.