Small but very powerful underwater strobe. The same level of basic features and durability as the D-2000 and marvelous high performance are driven with its compact body. Together with powerful and substantial Guide Number 20, the S-2000 benefits you with fast recycle time (minimum 1.5 sec. at full flash) and remarkable flash capacity thanks to less inner wiring and efficient component parts. In addition to reliable and super accurate S-TTL Auto mode mode, 12 step Manual mode supports professional lighting. Other features include the EV. Controller to make fine adjustment when shooting in S-TTL Auto and auto-switching function to accommodate to various pre-flash type (single or double pre-flash) digital camera.