Pitchblack Portable

Polyphonic Tuner

Scale: 12 note equal temperament
Detection Range: E0 (20.60 Hz) ~ C8 (4186 Hz), sine wave
Detection Accuracy: +/- 1 cent
Tuning Mode: Mono / Chromatic, Polyphonic / Guitar – Bass (Auto detection)
Display Mode: Regular / Strobe / Half Strobe *0.1 cent indication when using strobe
Calibration Range: A4 = 436-445 Hz (1 Hz steps)
Flat / Capo: Flat (b): Can tune down; up to five steps (Chromatic Scale), Capo(#): Can transpose up; up to seven steps (Chromatic Scale)
Input Impedance: 1 M Ohms (when tuner is on)
Current Consumption: Maximum 130mA
Output Current: Maximum 200mA
Connectors: Input /Check (mono 1/4" jack), Output (mono 1/4" jack), Cable Check (mono 1/4" jack), DC IN (9V), DC OUT (9V)
Power Supply: AA Alkaline batteries (LR6) x 2, Optional AC adapter (9V)-ready
Battery Life (Tuner on, Polyphonic tuning mode): approximately 15 hours of continuous use with the tuner on (LR6, using Polyphonic input continuously, Regular meter)
Dimensions (W x D x H): 161 × 60 × 33 mm / 6.34 x 2.36 x 1.30 inches (including rubber feet)
Weight: 268 g / 9.45 Oz. (including battery)
Color Variations: Aluminum Black (PB-04-BK), Aluminum Silver (PB-04-SI), Aluminum Red (PB-04-RD)
Accessories: AA Alkaline batteries x 2 for verifying functionality
Options: AC adapter (9V)

https://www.korg.com/uk/products/tuners/pitchblack_portable/index.php