CHROMATIC CALIPER TUNER Korg Sledgehammer Pro caliper tuner. Simple one-hand operation. Ultra-precise tuning of ± 0.1 hundredths. 3D visual meter that offers revolutionary visibility. Three measurement modes. Its clip offers a secure hold as well as greater flexibility. Calibration, auto-shutdown and memory backup. Scale: 12-note equal temperament. Tuning range: A0 (27.50 Hz) ~ C8 (4186 Hz), sine wave. Calibration Range (sine wave): Chromatic: A4 = 436-445 Hz (steps 1 Hz). Detection Accuracy: +/- 0.1 hundredth. Reference Tone: 436? 445 Hz (1 Hz steps). Dimensions: 62 x 62 x 53 mm. Weight: 28 g.