Scale: 12 note equal temperament Detection Range: Guitar: 7B, 6E, 5A, 4D, 3G, 2B, 1E Bass: Low B, 4E, 3A, 2D, 1G, High C Tuning Modes: Meter mode, Sound Out mode Flat Tuning: 1-5 semitones (semitone 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 (?21mm) 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