Our light flasher is designed to control the led modules of lightbars and lighthead. There are 25 flash patterns in total.

Powered by DC12V and waterproof IP65.

Wire specs as below:
Red: positive
Black: negative
Yellow: pattern change
Blue: cruise mode
White: sync 4pcs flasher at most

There are 5 wires in total. 
The blue wire is for cruise mode if you install it into the light bar.
The yellow wire is for a pattern change, activated by positive.