It's a Tuner in a Foot Pedal! The DT-10 Digital Foot Pedal Tuner joins Korg's wide range of digital tuners, known for their accuracy and versatility. It features an LED-type meter for rapid response and accurate detection, guaranteeing stable tuning. The 16-segment note display provides excellent visibility even on a dark stage, and the rugged body is designed for years of tough use. Features Floor-type chromatic tuner optimized for guitar and bass players Simple and stable design with a rugged body Easy to read 13 point LED display and note name display 16-segment note display for excellent visibility even on dark stages Flat-tuning up to seven semi-tones. Tune down to A! Detection range of E0 (20.60 Hz)--C8 (4186 Hz) 438 - 445 Hz calibration adjustment Two Selectable Outputs (Bypass and Tuner out) SPECIFICATIONS Scale:12 equal-tempered Meters:Cent indicator Detection Range:E0 (20.60Hz) - C8 (4186Hz) Calibration Function:438 - 445Hz (1Hz steps) Detection Accuracy: +/- 1 cent Input Impedance:1M Ohm Connectors:Input (1/4" mono), Output (1/4" mono),Bypass (1/4" mono),DC9V IN Power Supply:One 9V battery (Included), or AC Adapter (sold separately) Battery Life:Approximately 3 hours continuous use with tuner on (A4 input continuously), approximately 50 hours continuous use with tuner off (A4 input continuously). Current Consumption:Maximum 43 mA Dimensions:4.09" (W) x 4.69" (D) x 2.01" (H)104 (W) x 119 (D) x 51 (H) mm Weight:0.90 lbs. / 410 g