* This product uses 8 AA batteries (not included) and connects to the flash. * Compatible with following Nikon flash units: SB-11, SB-20, SB-22, SB-24, SB-25, SB-26, SB27, SB-28, SB-28DX, SB-80DX , SB-900 * Not compatible with SB800 * Other Flash Units are compatible with Nikon SD-8A battery pack * Note: The Battery Pack is not produce by Nikon but the quality same as Nikon.