Reference frequency adjustable: 432 - 445 Hz (in 1 Hz steps)
Detuning function with 3 settings (b / bb / bbb)
Accuracy: +/- 1 cent
Metal housing
Power supply via enclosed 9 V battery or optional 9 V DC power supply (RockBoard Power Ace, polarity (-) inside, 2.1 x 5.5 mm barrel connector, not included)