This was started through crowdfunding by Odisei Music in Barcelona, Spain. I waited 3 or 4 months and finally got my hands on it. With the iPhone app (travel sax), you can use 3 types of saxophones (soprano, alto, and tenor) and make fine adjustments. You can change the amount of breath noise. It's compact, so you can carry it around in a case. It's perfect for practicing the saxophone in places where you can't make noise. I'm selling it because I built a soundproof room and no longer need it. It's almost unused. #ElectronicSax #DigitalSax #TRAVELSAX #TravelSax