Warwick Rocktuner PT 2 black, pedal tuner for electric instruments, chromatic, true bypass, segment (FND) & LED display, separate output for audible tuning, tuning range: A0 (27,5 Hz) - C8 (4168 Hz), reference frequency: 436 - 445 Hz (set in 1 Hz steps), precision: +/- 1 cent, metal housing, Power: 9V battery (incl.), optional 9V DC adapter #108096 (not included), polarity: minus (center) plus (ring), dimensions (W x L x H): 5,9 cm x 10,8 cm x 3,6 cm, weight: ca. 300 g (incl. battery), colour: black.,