The microphones are distributed eleven on the keys and two on the basses.
It has individual volume settings and tone controls for the keyboard and bass.
The circuit works at a frequency of 20hz to 25khz, with a sound level of up to 180 dB and is powered by a 9-volt battery. System consumption 4 mA, alkaline battery lasting approximately 300 hours.
The system also has some presets that can change the gain settings on the basses and keys, as well as cuts in bass frequencies and keys, so you can customize the system to the instrument.
