With the change in technology, the sound systems need to buck up and match up the latest standards, which they very well are. Take for example, the Sound System audio output device that works through the energy given by the photovoltaic phanels. This way they save a lot of electricity/batteries and turn our views to the renewable sources of energy. The Sound System does not even need cables for the auto-feeding as it is equipped with ultra wide band technology and all systems in possession of this technology can connect with this system. The wireless system is easy to transport and can be used anywhere.

[Designboom]