Battery life, after installing the handle, you can install an extra battery to increase the power when . Increase the balance, the camera will lose balance after installing a lens, and the handle acts as a stabilizer. Vertical , vertical is more convenient when portraits. Protect the camera and prevent the camera from being bumped. With a dust/splash-resistant rugged design it allows for a more comfortable grip even when from vertical angles. Model: MB-N11 handle Applicable models: suitable for Z6II, Z7II cameras Power supply system: use one or two EN-EL15C/EN-EL15B/EL15A/EL15 lithium batteries Working temperature range: 0-40C Product size: about 139 x 77 x 118mm Material: ABS Colour: Black Package Contents: 1 x Camera Handle Only 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.