The Patch consisted of two arrows. The arrows consisted of LED strips placed under fabric, covered by clear buttons that diffused the light. The result was that when the LED strips were powered, an arrow would light up.  There were 2 arrows, and both of them were connected to switches that turned them on and off. The result was two flashing turn signals that could be turned on and off at will. If you had the ability to program you would be able to change the colors if you wanted.