Adapter ini digunakan untuk menghubungkan Gitar/Bass dengan iPhone. Dengan dual output, selain dihubungkan dengan iPhone dapat juga dihubungkan dengan amplifier secara bersamaan. Untuk iPhone bisa menggunakan berbagai applikasi.
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You bought Strumtune(TM) and now what? Your instrument is electric! You can't just clip your iPhone onto the headstock! Problem solved: The GB2i is the perfect interface between your Guitar or Bass and Strumtune. Simply plug your instrument into the GB2i, and the mini lead from the GB2i into the iPhone headphone jack and start tuning.Don't want to unplug after tuning? Plug your lead into the GB2i output and into your amp. Don't have an amp? Listen to the sound through your headphones/ earbuds via the Headphones jack. Why carry a phone AND a tuner?