The Nikon MB-D12 Battery Grip for D800/D810 attaches to the bottom of the camera and, with a spare EN-EL15, EN-EL15a, or EN-EL15b battery (batteries not included), provides you with an additional approximate 1,800 shots. It also can provide you with a better ergonomic grip on the camera body. When in DX mode, the Nikon MB-D12 boosts the frame rate from 4 FPS to 6 FPS. It is compatible with the following cameras:

• Nikon D800

• Nikon D800E

• Nikon D810

• D810a

• (1) Grip

• (1) Removable Tray for EN-EL15, EN-EL15a, or EN-EL15b Batteries (Batteries Not Included)

• Shoots in Portrait or Landscape Position with Vertical Shutter Release Button

• Controls: Shutter Button, AE/AF Lock, Multi-Selector, Main and Sub Command Dials

• 1/4"-20 Thread Tripod Port on Bottom

• Weight: 10.3 oz

There is no manual for this product.