The SB400 flash from Nikon will follow your photo digital camera wherever it goes to give it an additional lighting source for both indoor and outdoor photos. It has a guide number of 30 at 200 ISO and is compatible with all iTTL measurement systems based on the prelighting analysis of your device. This way, the SB400 can offer a balanced flash for spectacular results. In addition, its pivoting head enables it to change lighting direction for creative shots.The compact and lightweight SB400 is simple to use and runs on two AA batteries not included.