Aputure Battery Grip 550DL - Manual (Page 18)

Using the Battery Grip
*Turning the vertical-grip/switch to make the battery grip buttons and dial
function in the same way as those on the camera.
*When shooting in the horizontal-grip position,turn the vertical-grip/switch to
so that you do not accidental use the buttons or dial on the battery grip.
Caution
Remove the battery from the battery grip when the camera will not be used for an extended
period.Never attempt to disassemble or repair the product by yourself.Any malfunction or
accident results from such action is not covered by the warranty.