SEA&SEA released its exclusive YS-250PRO(Black) model designed to overcome the challenges in digital photography. YS-250PRO has a power flash which is produced at guide number 32(land, ISO 100/m), it allows manual adjustment of flash power. With a high-capacity Ni-MH battery fully charged to give 200 flashes and a recycle time of 1.8 seconds, it uses a high luminosity white target light to manage the strobe and has a depth rating of 60m/200ft. A ready lamp and a TTL confirmation lamp are added benefits. Other features include three fiber-optic cable sockets (2 of them with slave sensor) and a pre-flash cancellation that can handle up to two pre-flashes from a camera. With a beam angle of 105° and 107x130x223mm / 4.3x5.2x9inch in dimensions; it weighs 1,780g on land and -80 grams underwater.