Fender LEVEL SET BUFFER, Quick Manual, Page: 5 / 8

Input Jack
This is a high-impedance input suitable for electric guitar, bass,
acoustic guitars with pickup systems, keyboards and other
instruments.
Main Output Jack
This is a low-impedance output jack that connects to the amp or to
the next effect pedal in the signal chain.
Tuner Output Jack
This jack connects to a tuner’s input jack.
DC Power Connector
This is a standard, center-negative 9VDC jack for use with
appropriate power supplies.
LED Kill Switch
This switch extinguishes the LEDs that illuminate the knobs—useful in
maximizing battery life when running the pedal from batteries.
Low Battery Indicator
This red LED on the front of the battery door illuminates when battery
voltage drops below a set threshold, indicating that the battery
should be replaced soon.