This Video give an quick overview of what the Drongo Voicealert, also covers some installation guidelines and ways to make your drongo VoiceAlert even better than it already is.
Adding Additional Beams
The Drongo VoiceAlert has 6 zones, but if you have a big property, you are going to need more than 6 sensors to cover it. This video will explain how it all works and how to easily link any number of sensors to your system.
Sensor Jumpers Technical Video
His new-fangled sensor has some jumpers that enable and disable some really cool functionality. This video de-mystifies those functions and makes it easy to expand your system.