Joyo JF-326 Irontune , Effect Pedal Size Tuner, Ironman series, +/- 0.1 cent accuracy, Tuning range: E0 (18 Hz) - C8 (4186 Hz), Lightweight and compact, Foot switch: Effect bypass, Input and output: 6.3 mm jack, Mains adapter connection: Hollow plug socket 5.5 x 2.1 mm, negative pole inside, Current consumption: 90 mA, Power supply with a 9 V DC mains adapter (not included), suitable power supply unit: Art. 409939, True bypass, Dimensions (W x D x H): 43 x 73 x 50 mm, Weight: 220 g@+@+*Note:* Battery operation is not supported