GB2i delivers inspiring guitar tones and great audio quality on your iOS device, for iPhone, iPad or iPod touch. Play with your favorite tones, connect speakers to create your mobile recording studio, or plug into your amp and play live. GB2i makes it easy and fun to record with Garageban and other core audio music apps. While practicing in the night, GB2i is the most convenient tool to play with your mobile device and earphone.Features:The 6.35mm input jack is designed for guitar, bass and also applicable for keyboards, microphones, mixers, etc.The 6.35mm output jack can be connected to an amplifier.Also with a 3.5mm stereo headphones jack.The 3.5mm input plug connects to your iOS device, for iPhone/iPad/iPod touch.for iOS devices apps: Effects, Tuners, Metronomes, Tone generators, Recorders, Amps, etc.Specifications:Output Jack: 6.35mm output jack, 3.5m stereo output jackInput Jack: 6.35mm input jackItem Weight: 18g/ 0.6ozPackage Size: 10.5 * 9.5 * 2cm/ 4.1 * 3.7 * 0.8inPackage Weight: 40g/ 1.4ozNote:The smartphone showed in the picture is not included.Package List:1 * Interface1 * User Manual(English & Chinese)