The Korg Pitchblack Custom Pedal Tuner features the first vertical 3D visual meter on a pedal tuner. Enjoy an unprecedented level of visibility with the three-dimensional lights and versatile display modes. In addition to allowing ultra-high +/- 0.1 cent tuning precision it features true bypass switching that prevents any coloration of your tone. The durable aluminum die cast body provides a DC output that allows parallel connection for powering other effects pedals. The Pitchblack Custom will provide years of trouble-free operation designed with the needs of professionals in mind and offers unbeatable visibility and accuracy for all guitarists and bassists. Features Part of KORGs “Custom Shop” series a mark of ultimate quality 3D visual meter creates a revolutionary visual effect Ultra-high tuning accuracy of +/- 0.1 cents Four types of meter display modes True bypass prevents any coloration or loss in the sound DC out allows parallel connection for powering other effect pedals Three times longer battery life Specifications Scale: 12 note equal temperament Detection Range: E0 (20.60 Hz) – C8 (4186 Hz) Calibration Range: 436 – 445 Hz (1 Hz steps) Detection Accuracy: within +/- 0.1 cent Input Impedance: 1 MΩ (when tuner is on) Connectors: INPUT (mono 1/4″ jack) BYPASS (mono 1/4″ jack) DC IN (9V) DC OUT (9V) Power Supply: 9V battery or 9V AC adaptor Battery Life: approximately 15 hours (A4 continuous input tuner on display mode: Regular A using a 9 volt zinc-carbon battery) Consumption Current: Maximum 40mA Dimensions (W x D x H): 68 x 113 x 45 mm/ 2.68″ x 4.45″ x 1.77″ (including feet) Weight: 286g / 0.63 lbs (including battery) Included items: one zinc-carbon battery for verifying operation Accessories: AC adaptor (9V)