1. This guitar adapter is a combination of the easy-to-use instrument interface adapter and guitar and bass tone mobile software 1.The musical instrument interface adapter which is easy to use plus the guitar and bass tone mobile software makes up this guitar adapter 2. As for the software, the free app whose name is AmpliTude is fit for iTunes App Store, so that this adapter is suitable for iPhone, for iPod and for iPad 3. Insert your guitar or bass into the adapter 1/4 jack and plug your headphone or external speaker into the headphone jack of this adapter. Then, you could launch the Ampli Tube Free and start rocking according to your need 4. The 3.5mm headphone interface is so common that you could feel free to connect it with your headphone or speaker most of the time 5. The app for IOS is free when you are downloading it on your own. Make it easy and convenient
