The Feedback Ferret II has all the features that made the original so remarkable, such as precise digital filters that pin down exact problem frequencies, balanced I/O, and an internal power supply. The applications are virtually limitless. 16 digital dynamic filters, 4 user presets, panic filter (for sudden, unexpected feedback), lock function (locks current filters), and dual mono feature that enables 32 filters result in true professional feedback suppression to match anything out there at any price. Power-up recall function, 1/4" and XLR connectors, +4 and -10 switches on each in/out, internal power supply, and RS-232 port for future expandability.