The TS9B is equipped with controls that allow bassists to produce the sound they want while still maintaining the feel of the original Tube Screamer. Experimenting with the mix and tone controls allows for creation of a limitless number of sounds. Players can go from just "a little bit of hair" to "full-on" vintage fuzz and everything in-between.
•Drive, Mix, Bass, Treble and Level controls •Power Supply: One 9 volt battery (006P) or external AC adapter (Use only DC 9V (Negative center pin))
source: www.ibanez.com