CowboyStudio External Flash Battery Pack for Nikon SB 900 Speedlight Flash Units

From the Manufacturer This CowboyStudio Battery Pack would be a great addition to your studio. The Flash Battery Pack is an external power source for a higher flash capacity. This high performance power pack is a light, compact, and used for Canon flashes. This is a must for event photography such as weddings, and for high frame rate Canon cameras. Nikon's Speedlight unit provides flexible lighting both as a stand-alone Speedlight or a remote unit. The setup is also far quicker than that of a built-in commander unit. Specifications: 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 Product dimensions: 69mm x 158mm x 25mm Note: The Battery Pack is not produce by Nikon but the quality same as Nikon. Directions: Plug the cords into the flash to provide extra battery power. **Please: Note that this battery pack does not replace the batteries in your camera. It is used in addition to the batteries already in your flash.