Peterson StroboClip HD, Chromatic Clip Tuner, True strobe, 0.1 Cent accuracy, Works on every instrument, Buzz Feiten Tuning compatible, Creates an octave under the low B on bass, High-definition display with backlight, Wider viewing angle - visible in direct sunlight, Adjustable calibration from 390 Hz up to 490 Hz, Drop Tuning and Capo Settings, Over 50 sweetened tunings for various instruments with USB, Includes battery / button cell CR2032