Nikonos Speedlight SB-103 is an amphibious high performance electronic flash unit with a silicon-controlled rectifier and series circuitry. The SB-103 is designed for use with Nikonons V, IV-A and III bodies. The flash has automatic TTL flash exposure control. It can be submerged to a depth of 50 meters and withstand pressure of up to 6kg allowing it to be used in environments where regular speedlights cannot be taken.
**Use flash in full compliance with instructions and cautions in the instruction manual. DO NOT use charged and uncharged NiCd batteries together as potential danger may rise. Always use a fresh set of fully charged batteries with this unit.