This Slave Flash Trigger is good helper in situation, when is needed use Fill-in flash, Bounce flash or it is possible use flashgun at Underwater Photo and Close-Up Photo. Slave Flash trigger is good supplement for digital camera, because is able to eliminate any measuring preflash. Thanks to optical connection, flashgun is able to work like wireless also on big distance. Slave Flash Trigger Software version FL6318 for processor Microchip PIC 12F675 included.