The Rockboard Stage Tuner RBO-E-ST-01-V2 is a professional pedal tuner designed for electric instruments. This chromatic tuner features a 28-segment LED display for precise tuning visibility on stage, with a wide tuning range from A0 (27.5 Hz) to C8 (4168 Hz). True bypass ensures your signal remains unaffected when the tuner is disengaged. The separate audible tuning output lets you hear pitch without affecting your main signal. With adjustable reference frequency (432–445 Hz in 1 Hz steps) and a detuning function offering three settings, it accommodates various tuning preferences and alternate tunings. Precision tuning reaches ±1 Cent accuracy. The rugged metal housing withstands touring demands, while compact dimensions (73 x 110 x 47 mm) fit easily on any pedalboard. Power via included 9V battery or optional RockBoard Power Ace adapter. Maximum current draw is 22 mA, making it efficient for battery-powered setups.