This Pedal is discontinued.
Tuner
Reference Pitch: A4 = 438 to 445Hz (1Hz step) Tuning Range: C0 (16.35 Hz) to C8 (4186.00 Hz) Tuning Accuracy: +/-3 cent Input Impedance: 1 M ohms
https://www.boss.info/global/products/tu-2/
Included in 369 Pedalboards, 246 are public: