This quantum locking module and short cable enables the use of the bantam or battery 1 compact qb1c battery pack with the canon 540ez canon 550ex contax tla360 metz 54mz3 minolta 3600hsd minolta 5600hsd nikon sb24 nikon sb25 nikon sb26 nikon sb27 nikon sb28 euro nikon sb28 non euro nikon sb28d nikon sb28dx nikon sb29 nikon sb80dx nikon sb800af sunpak pz5000af and olympus fl 50 flashes