Boss TU-3 Bundle@+*Bundle offer comprising*, Boss TU-3, Chromatic Floor tuner, Cent mode (display as a classic tuner) or Stream mode (running light display), 21 Segment LED meter, Tuning range: C0 (16.35 Hz) up to C8 (4.186 Hz), Accu-Pitch, High-Brightness mode, Chromatic tuning in accordance to note names or string numbers 1 to 6, Flat Tuning up to 6 semitones below, Mute or Bypass, Also suitable for 7-string guitars and 6-string basses, Accuracy +/- 1 Cent, Adjustable reference tone from 436 up to 445 Hz, Powered with 9 V batteries or 9V DC power supply (coaxial connector - negative pole inside, not included, needs to be ordered separately under Article Nr #409939#), Dimensions (WxHxD): 73 x 59 x 129 mm, Weight: 390 g, Thomann NT 0910 AC/PSA, AC /PSA Power Supply for Effects Pedals, Suitable for devices by Ibanez, Boss, Behringer and others, 9 V DC / 1 A, Connector: 5.5 mm / 2.1 mm, Polarity: + outside, Switching power supply technology