• Sharp 21-segment LED meter with brightness control
• High Brightness mode enhances meter visibility when playing outdoors
• Accurate to +/- one cent
• Accu-Pitch Sign function provides visual verification when tuning is complete
• Chromatic mode for tuning to any pitch
• Guitar and Bass modes for tuning by string number, with support for 7-string guitars and 5- and 6-string basses
• Flat tuning options support down tuning up to six semitones below standard pitch (Guitar mode) and three semitones below (Bass mode)
• The output automatically mutes when the tuner is engaged, allowing for silent tuning on stage
• DC output jack for distributing power to other pedals (requires optional PSA-series adaptor and PCS-20A parallel cable)
• BOSS five-year warranty

Tuning RangeC0 (16.35 Hz)--C8 (4,186 Hz)Reference PitchA4 = 436--445 Hz (1 Hz step)Tuning Accuracy+/- 1 centModesChromatic
Chromatic flat x2
Guitar
Guitar flat x2
Bass
Bass flat x3Display modeCent mode
Stream modePower SupplyCarbon-zinc battery (9V, 6F22) or Alkaline battery (9V, 6LR61)
AC adaptor (sold separately)BypassBuffered bypassControlsPedal switch
MODE button
STREAM/CENT buttonNominal Input Level-20 dBuInput Impedance1 M ohmNominal Output Level-20 dBuOutput Impedance1 k ohmRecommended Load Impedance10 k ohms or greaterIndicatorCHECK indicator (Serves also as battery check indicator)ConnectorsINPUT jack
OUTPUT jack
BYPASS jack
DC IN jack
DC OUT jackCurrent Draw20 mA (DC 9 V)
80 mA (DC 9 V, when High Brightness mode is on)Expected battery life under continuous useCarbon: Approx. 5 hours
Alkaline: Approx. 21 hours
*These figures will vary depending on the actual conditions of use.