The Fender RT-1000 Rack Tuner is a single-space chromatic tuner that uses the same chip as the PT100 pedal tuner and allows use of any latching on/off footswitch. Tunes to a bass guitar's low G (24.5Hz) and calibrates from 438-445Hz. 2 output jacks allow for muted tuning. Designed to complement the look of the Fender professional bass amplifiers!