Boss

TU-3 Chromatic Tuner

Chromatic tuner pedal with 21-segment LED meter, high-brightness mode, drop tuning support, and guitar/bass modes. 9V DC OUT jack for daisy-chaining power to other pedals.

Pedal Tuner

Bypass

Buffered

Power

Voltage
9.0V
Current
85 mA
Polarity
Center Negative
Connector
Barrel 2.1mm
Battery
Yes

Ports

Name Direction Signal Connector Level
Input Input Audio 1/4" TS (6.35mm) Instrument
Output Output Audio 1/4" TS (6.35mm) Instrument
Bypass Output Audio 1/4" TS (6.35mm) Instrument

Power Outputs

Name Voltage Current Polarity Isolated
9V DC Out 9.0V 200 mA Center Negative No