Hasselblad Proflash 4504 TTL Flashgun, for Hasselblad V series cameras, bounce and swivel headed flash with a main flash head and a small fill in flash, you have a choice of six auto settings, TTL (through the lens), manual full, half and quarter power as well as a winder recharging setting, flash works on six 'AA' sized batteries, flash comes with AA battery holder, camera bracket and ND filter for fill in flash.