The Olympus Power Flash Grip (for FL-50,FC-01,STF-22, SRF-11) is the perfect flash power grip that allows the FL-50 electronic flash to be used as a grip-on type flash. It is powered by 4 'C' (R-14) alkaline dry cell batteries. The innovative technology combines the power from the grip with that of the flash's own batteries to charge the FL-50 at a higher speed. This helps in increasing the available flash emission count. The head of the grip can also be rotated to 180 degree, thus providing greater versatility. It also provides more creative options and in eliminating red-eyes effect.