The SubStrobe DS-160 is compatible with all Ikelite TTL systems and current digital cameras, as well as all older TTL film cameras including the Nikonos system. A variety of sync cords, sensors, and TTL adapters are available to connect to almost any camera system currently on the market. The SubStrobe DS-160 recycles virtually instantaneously when fired at a fractional power -- whether in TTL or manual mode -- and still in a quick 1.5 sec from full discharge. Use a compatible TTL system and enjoy perfect automatic exposure and an increased number of flashes per full charge. When used in manual settings, the DS-160 offers 10 powers in half-stop increments for precise control over your exposure. A super-bright built-in 5-watt LED modeling light is perfect for focusing or night diving-- all with minimal drain on the strobe's battery. The beam is even, concentrated, and automatically turns off and on when the strobe fires. The #4060 DS-160 includes interchangeable rechargeable NiMH battery pack, flash diffuser, and standard mount with through-bolt. The NiMH battery pack requires #4066.1 Smart Charger, not included. An optional #9571.4 mount with 1" (2.5cm) diameter ball allows you to build a custom arm or attach the strobe to TLC or Ultralight arm systems.