iRig 2 aims to provide better sound quality and increased flexibility over its predecessor. The interface still plugs into the headphone jack on your iPhone or iPad, letting you send your guitar's signals to compatible apps. iRig 2 has added a gain control for precise input gain adjustment for their instrument.
From IK Multimedia:
With iRig 2, you get an input gain dial that gives you the power to ensure high-quality sound in every situation. This means that you'll be able to perform at your best no matter whether you're connecting a wailing 3 humbucker electric guitar to your Samsung Galaxy Note 4 or a jazzy archtop to your iPhone 6.
Alongside it's 1/8-inch headphone output, iRig 2 now has a 1/4-inch output to connect to an amplifier. This allows you to take iRig 2 on stage with you, and you can plug it into a guitar amplifier or speakers without an adapter. The new FX/THRU switch lets you play through an amplifier while plugged into your mobile device.
iRig 2 comes with a number of apps out of the box, including a free version of AmpliTude for iOS and Mac.
You can get order iRig 2 right now for $39.99 from IK Multimedia
Source: IK Multimedia