Buy from Amazon : br br INON S-2000 Underwater Flash Strobe br br Package Includes Inon S-2000 Strobe White Diffuser Filters Spare O-ring br Compatible Cameras Universal Fiber Optics Sync Cord TTL connector br S-TTL Auto - a new INON TTL flash technology that implements TTL via a fiber optic connection mimicking the cameras pre-flash br 12-Step Manual Power Settings br Depth Rated to 100 meters330 feet Built-in Focus Light