External Flash Battery Pack for Nikon SB-900 (8*AA/SD-9)
Model: FB-2 - External power source for higher flash capacity - Supports two group of symmetrical charge system; you can install 8 AA batteries to supply sustaining power - Compatible with genuine Nikon SD-9 battery pack - Built-in thermal protection switch - Designed for Nikon SB-900 - Cable length: 150cm - Comes with soft nylon case