The SA-100 Dual Strobe Kit for Ikelite DS Substrobes from Ikelite consists of two SA-100 Arms and a Ikelite ICS-5 Digital TTL Dual Sync Cord. It is compatible with Ikelite DS Substrobes for underwater photography (strobes not included). Each arm provides full strobe aim with 2 clamps and a 6" (15 cm) extension. The overall extended length is 14" (34.5 cm). Each arm has 2 segments, both of which have ball joints. The ICS-5 coiled Y-type sync cord connects 2 Ikelite substrobes to an Ikelite TTL/Digital underwater camera housing. Each strobe can be fired in TTL/auto and manual exposure modes, so long as the housing features the appropriate TTL/auto hot-shoe assembly. Otherwise, strobe triggering through the cord is limited to manual exposure.