Flextone™ III is Custom Tone Ready. CustomTone.com is our online library of Tone exclusively for Line 6 products. Line 6 has made a unique investment by professionally programming thousands of Tones matched to the signature sounds of some of the greatest guitarists, bands, songs and guitar gear of all time, and making all that Tone available to you for free at CustomTone.com. There's also a User library where you can submit your own Tones and grab Tones created by Line 6 users around the world.
Foot Controllers
FBV2™
Scrolls through Channels A, B, C, & D
Self-powered though the locking cable
FBV Express™
Switches for channels A, B, C, & D
Volume/Wah Pedal
Chromatic Tuner Interface
Self-powered through the included locking RJ-45 cable
Flextone™ III is Custom Tone Ready. 
FBV Express™ 
