Peterson StroboStomp HD, Pedal Tuner, With large HD display, Save different tunings in different colours to easily recall them, True Strobe with ± 0.1 cent accuracy, Over 100 sweetened tunings with USB connection for custom tuning, Calibration: A = 391 Hz to 490 Hz, Switch: Menu up/down & +/-; LED: Tuner On, Display: HD colour display, Foot switch: On / Off / Mute, True bypass, Input (6.3 mm jack), Output (6.3 mm jack), Power adapter connector (female connector 5.5 x 2.1 mm, negative polarity inside), Current consumption: 85 mA, Power supply with 9 V battery or 9 V DC power adapter (not included - suitable power adapter: Article no. #409939#), Dimensions (W x D x H): 66 x 129 x 54 mm, Weight: 397 g