Battery life, after installing the handle, you can install an extra battery to increase the power when shooting.Increase the balance, the camera will lose balance after installing a large lens, and the handle acts as a stabilizer.Vertical shooting, vertical shooting is more convenient when shooting portraits.Protect the camera and prevent the camera from being bumped.With a dust/splash-resistant rugged design it allows compatible with a more comcompatible withtable grip even when shooting from vertical angles.Product model: MB-D80Applicable models: compatible with NIKOND80/D90Power supply: EN-EL3e or 6 AA batteries (not included)Product size: 138 x 73.5 x 110mmMaterial: ABScolor: BlackPackage Contents:1 x Camera HandleOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.