Korg Pitchblack Advance, Floor Tuner, Scale: 12 Notes, Detection range: E0 (20.60 Hz) - C8 (4186 Hz), Reference pitch: A4 = 436 - 445 Hz, Accuracy: +/- 0.1 percent, Display: Regular, Strobe, Half-Strobe & Mirror, Connections: Input (6.3 mm jack, mono), Bypass (6.3 mm jack, mono), DC 9 V In, DC 9 V Out, Battery life: approx. 60 hours, Dimensions: 68 x 111 x 47 mm, Weight: 257 g, Power supply via 9 V battery or 9 V power supply unit (not included, suitable power supply available, article nr #409939#), Current consumption: 20 mA