The bFaaaP Switch makes it possible for those having leg disabilities, small children, and the elderly to enjoy playing the piano with sustained tones without using any foot. First, a head motion of a user is detected by an iOS device. Next, the head angle signal is transmitted to a bFaaaP Switch device. Then, this device activates an electric piano pedal function to sustain a tone. First, a head motion of a user is detected by an iOS device. Next, the head angle signal is transmitted to a bFaaaP Switch device. Then, this device activates an electric piano pedal function to sustain a tone. You need both the device and app for this system. You have to purchase a device before this app. Currently, the device can be shipped to only an address in Japan.
You can see how to set up and use from the following YouTube video:
https://youtu.be/XOVENtBsOp4