This flash trigger offers both optical and electrical triggering. Optical triggering is recommended for those flashes so equipped. (Compatible with NA-D5/D500, Ikelite DS-161, Sea&Sea YS-250, YS-D1, YS-D2, Inon Z-240 strobes)
To trigger your strobes electrically, add the appropriate electrical bulkhead and connect to the flash trigger board via two red Micro-MaTch connectors.
Two new electrical bulkheads have been created just for this purpose.