Works Verified, Excellent Condition The SONIC RESEARCH ST-300 pedal-type strobe tuner boasts an accuracy of ±0.02 cents. It directly displays the input analog signal on an LED ring. Its accuracy is ±0.02 cents. It supports True Temperament necks, Buzz Feiten Tuning System, and tuning up to 9-string instruments. You can connect via USB to program custom tunings. ■ Turbo Strobe Tuner ■ Features Strobe Display: Accurately displays even slight pitch differences. It can display even slight pitch deviations without latency. Switchable Output: You can switch between muting during tuning and always outputting. Ultra-High Precision Tuning: Tuning with an accuracy of ±0.02 cents. ■ Reference Pitch Change: The default setting is A4=440Hz. It can be set within the range of 300.0 Hz to 599.9 Hz. ■ Flat Tuning: Settings up to a maximum of 9 semitones (half steps) are possible. ■ Power-On Restore: This unit remembers drop tuning, A4 reference, and mode settings. ■ Power: DC9V power supply (center negative) or 9VDC dry cell battery ■ Power Consumption: 48mA ■ Size: W61mm x H112mm x D34mm ■ Weight: 246g