AmpKit LiNK – Interface
AmpKit App. 
If you want to plug in your guitar, AmpKit LiNK is the perfect solution!
* High fidelity guitar adapter for iPad, iPhone and iPod touch
* “The Low Crosstalk Interface” – critical for high-gain playing
* Perfect companion for GarageBand, AmpKit, and other apps
* 14″ cable designed specifically for use with iPad and iPad 2
* Works with all iPad / iPhone / iPod touch models*
* Only US$29.99 – in stock today at music retailers worldwide
*Except first-generation iPod touch
Buy it at Sweetwater HERE