A portable, pocket-sized tuning solution.The CA-50: the standard tuner for orchestral instruments, now with even better visibility. The CA-50 features high-precision tuning functionality and a slim and compact design. The new CA-50’s display is now, even easier to read. Long considered the standard in chromatic tuners, the CA-50 offers simple and intuitive operation and a satisfying tuning experience for every instrumentalist. Features - An even more readable display, with a larger note name indication. - A wide detection range supports tuning for any instrument. - Calibration function is provided. - Marks provided to indicate pure major and minor third intervals. - Sound Out mode is ideal for ear training. - Dramatic increase in battery life. - Reduced stress when using the unit on a music stand. - Memory backup function and auto power-off function provided. Specifications Scale: 12 note equal temperament Detection Range (Sine wave) A0 (27.5Hz)–C8 (4186Hz) Reference Tone: C4 (261.63Hz)–C5 (523.25Hz) One octave Tuning Modes: Meter mode, Sound Out mode Calibration Range: A4 = 410Hz–480Hz (1Hz steps) Detection Accuracy: +/- 1 cent Sound Accuracy: +/- 1.5 cent Connectors: INPUT jack (1/4" monaural phone jack), OUTPUT jack (1/4" monaural phone jack) Internal Speaker: Dynamic Speaker (φ21mm) Power Supply: AAA battery (3.0 V) x 2 Battery Life: Approximately 135 hours (zinc-carbon batteries, Meter mode, A4 continuous input) Dimensions (W x D x H): 100 mm x 67 mm x 17 mm / 3.94" x 2.64" x 0.67" Weight: 81 g / 2.86 oz. (including batteries) Included Items: Two AAA batteries for verifying operation Accessories (sold separately): CM-200 Contact Microphone