This paper presents a description of the design and usage of Eolos, a wireless MIDI wind controller. The main goal of Eolos is to provide an interface that facilitates the production of music for any individual, regardless of their playing skills or previous musical knowledge. Its features are: open design, lower cost than commercial alternatives, wireless MIDI operation, rechargeable battery power, graphical user interface, tactile keys, sensitivity to air pressure, left-right reversible design and two FSR sensors. There is also a mention about its participation in the 1st Collaborative Concert over the Internet between Argentina and Cuba "Tradicion y Nuevas Sonoridades".