Boss TU-3 Chromatic Floor Tuner - cent mode (like a classical tuner) or Stream mode, Accu Pitch, high brightness mode, flat tuning, mute/bypass, C0-C8 range (16.35Hz-4.186kHz), also for 7-string guitar and 6 string bass, +/- 1 cent accuracy, 436-445Hz accuracy, powered via 9V battery (included) or optional power supply (Boss PSA-230 or PSB-230), power for up to 7 additional effect pedals. Dimensions: 7.3 x 5.9 x 12.9cm. Weight: 390g
