• Tuning Range :  C0 (16.35 Hz)–C8 (4,186 Hz)
• Reference Pitch :  A4 = 436–445 Hz (1 Hz step)
• Tuning Accuracy :  +/- 1 cent

Modes

• Chromatic
• Chromatic flat x2
• Guitar
• Guitar flat x2
• Bass
• Bass flat x3
• Display mode :  Cent mode, Stream mode
• Power Supply :  AC adaptor (sold separately)
• Current Draw :  35 mA (DC 9 V) ,95 mA (DC 9 V, when High Brightness mode is on)
• Bypass :  Buffered bypass
• Controls :  MODE button, STREAM/CENT button
• Nominal Input Level :  -20 dBu
• Input Impedance :  1 M ohm
• Nominal Output Level :  -20 dBu
• Output Impedance :  1 k ohm
• Recommended Load Impedance :  10 k ohms or greater
• Indicator : CHECK indicator (Power on indicator)

Connectors

• INPUT jack
• OUTPUT jack
• DC IN jack
• DC OUT jack

Accessories

• Owner’s Manual
• Leaflet (“USING THE UNIT SAFELY,” “IMPORTANT NOTE,” and “Information”)
• Parallel DC code (DC Plug x2)
• Rubber foot
• Options (sold separately) : AC adaptor: PSA series, Parallel DC cord: PCS-20A (DC Plug x8)

Manufacturer’s Description

The BOSS TU-3 is the world’s go-to stompbox tuner, trusted by players everywhere for its reliable operation and bulletproof durability. Scaled down in size, the TU-3S gives you the same industry-standard performance in a tiny footprint that saves precious pedalboard space. The display and tuning functions are identical to the TU-3—the only thing eliminated is the pedal switch. Always on and ready to go, the TU-3S is perfect for use with pedal switching systems like the BOSS ES-8 and ES-5, and ideal for any setup where space is at a premium

Features

• Respected TU-3 tuning performance in a more compact size
• 21-segment LED meter with brightness control
• High Brightness mode enhances meter visibility outdoors
• Accu-Pitch Sign function provides visual verification when tuning is complete
• Chromatic and Guitar/Bass modes, with support for 7-string guitars and 6-string basses
• Guitar Flat mode supports “drop” tunings up to six semitones below standard pitch
• Powered by optional PSA-series adapter; DC Out jack for powering up to seven BOSS compact effect pedals via an optional PCS-20A daisy-chain cable
• BOSS five-year warranty