2 purposes:
1) "Someone asked me to create a simple Beeper Box to allow a non-verbal switch user to do Morse Code with 1-2 switches. This device does that! 1 switch for dot/dit, or 2 switches for HIGH pitch/low pitch." RJ
2) A simple switch tester.
Comes with batteries. Switch(es) not included.
Imagine if you could be satisfied and content with your purchase. That can very much be your reality with the Beeper Box.