Easy Velcro attachment for slave strobe activation. Particularly useful in ultra clear water where light from internal (on camera) flash can dissipate rapidly and not activate slave strobe. The fiber optic cable is connected between an Intova ISS4000 Strobe and a camera (by placing Velcro pad on the waterproof housing in front of or near the on-camera flash) attached to Intova's mount system. The cable can also be used with most other brands of waterproof strobes on other mount systems.