Siegel has developed two types of harvesters for different electromagnetic fields: a smaller harvester that is suitable for lower frequencies below 100Hz which you can find in the general mains (50/60Hz, 16,7Hz) and a bigger one that is suitable for lower and higher frequencies like radio broadcast (~100MHz), GSM (900/1800MHz) up to Bluetooth and WLAN (2,4GHz).
Siegel was awarded second place by University of the Arts Bremen in the category of Digitale Medien for his work.
There are GHG's (Greenhouse Gases) in YOUR Backyard!