SEA&SEA SS-03114 YS-D1 Strobe (BLACK) Has a depth rating of 330 ft. Compatible with 5-pin sync cords or N and fiber-optic cables (L-type) Equipped with 3 TTL circuitries: DS-TTL II, Slave TTL, and conventional Nikon type Powered by 4x AA Ni-MH or Alkaline batteries Recycle time of 1.9 sec with Ni-MH batteries