Again, based on that website it's likely an LED controller to blink or sequence LEDs- however that specific function of the sequence or "what it does" is specific to the code flashed to the microcontroller chip. So they used one common board- and then programmed them for different functions.
I cannot see in your picture if the orange painted chip has any text on it indicating the program type.
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Again, the current series of boards says this- but unknown if that then applies to the older series 100-3
• Input 9-12V AC/DC
• Dimensions 1.70" X 1.70"
• Draws approximately 10mA
I would try a 9V DC battery as a test leaving the LEDs connected to the outputs and see what it does.
