Korg LCA-120 Chromatic Flip-Up Digital Tuner Specifications: Scale: 12 note equal temperament, program (88 notes) Detection Range: A0 (27.50 Hz) to C8 (4186.01 Hz) Reference Tone: C2 (65.41 Hz) to C6 (1046.50 Hz) Tuning Modes: Meter (AUTO), Focus Tune (AUTO), Sound Out (MANUAL), Sound Back (AUTO) Calibration Range: A4 = 410 Hz to 480 Hz (1 Hz step) Detection Accuracy: Better than ±1.0 cent Sound Accuracy: Better than ±1.5 cents Volume Detection Display Programmable Temperament Function Connections: INPUT (1/4"), Headphones (1/8" mini), DC IN (9V) Speaker: Dynamic speaker (16 mm x 35 mm) Power Supply: Two AAA alkaline batteries (3V) or AC adapter Battery Life: Approximately 60 hours (when tuner is operating with alkaline batteries, Meter mode, A4 continuous input and back-light off) Dimensions: 3.98" (W) x 3.31" (D) x 0.81" (H) (folded) Weight: 5.22 oz. (including batteries) Included Items: Two AAA batteries for checking operation Korg LCA-120 Chromatic Flip-Up Digital Tuner Features: Extra large backlit LCD for excellent visibility "Focus Tune" function allows for even more accurate tuning within +/-10 cents Sound Level meter visually indicates the volume of a performance Korg's own Sound Back mode lets you tune using a reference tone together with the meter (using the optional CM-100L contact microphone) Temperament Program function lets you specify the tuning pitch for each note A wide tuning range of A0-C8 (88 notes) and adjustable calibration (410 Hz-480 Hz) supports all types of instruments A four-octave reference tone is built-in Indicator marks for perfect major and minor thirds are provided Built-in microphone