http://line6.com/legacy/images/Floorboard.jpg Line 6 Floorboard:   ONLY Compatible with: AX212, 1st Generation POD/Bass POD, POD Pro (labeled "Pedal" above Cat 5 Connector"), 1st Generation of Spider (Red Faced) Flextone 1, Flextone II, Flextone HD.   http://line6.com/legacy/images/FB4.jpg FB4:   ONLY Compatible with: AX212, 1st Generation POD/Bass POD (labeled "Pedal" above Cat 5 Connector"), 1st Generation of Spider (Red Faced) Flextone 1, Flextone II, Flext