Next-generation, pedal tuner featuring the new ULTRA BUFFER is even more powerful and easy to use. The majority of electric guitars use passive pickups with a high impedance output. When you are using a cable there is a loss of tone, usually high frequencies, after about 6 m (around 18 feet) and this problem gets worse the longer your cable. A buffer boosts the signal over long cables to avoid loss of tone, keeping it clean and clear - even when your pedal is off. The ULTRA BUFFER enhances the sound quality in bypass mode, so that you can still maintain audio quality even when using a long cable to connect to the tuner, or when inserting the tuner into a complex effects board. On the Pitchblack X, you can switch between true bypass and the ULTRA BUFFER, according to your tastes and performance environment. Specifications Scale: 12 note equal temperament Detection Range: E0 (20.60Hz)~C8(4,186Hz) Calibration Range: A4=436?445Hz(1Hz steps) Detection Accuracy: +/- 0.1 cent (display mode: Strobe) Input Impedance: 1 M-ohm (tuner on) Display Modes: Regular, Strobe, Half-strobe, Mirror Connectors: INPUT (mono 1/4” jack), BYPASS (mono 1/4” jack), DC 9V IN, DC 9V OUT Power Supply: 9V type battery(6LF22/6LR61/6F22)×1 or AC adaptor (9V) Battery Life: Approximately 24 hours(6LF22/6LR61, A4 continuous input, tuner on, display mode: Regular mode) / Approximately 5 hours(6F22, A4 continuous input, tuner on, display mode: Regular mode) Power Consumption: Maximum 28 mA Dimensions (W x D x H): 69 x 110 x 49 mm (including protrusions) Weight: 248 g