A block diagram of the system setup is shown below. The base.exe program runs on the communication device and monitors the USB port that the receiver microbit is connected to. When a trigger is received from the receiver microbit, a software keystroke is broadcast. This software keystroke is intended to control communication software or any other target software running. The default keystroke is F1, but this can be changed at run time.

The receiver microbit can remotely change the threshold of shake detection on the transmitter microbit using the two buttons on the receiver microbit. The transmitter microbit is worn by the end user. The threshold of shake detection can also be adjusted on the transmitter microbit using the two buttons on this microbit. When a shake is detected by the transmitter microbit, a signal is sent by radio to the receiver microbit.