portable and for us to use.High engraving. Easy and to install and remove. intimate photography assistant, help you to all the beautiful images and stably as ever.It is adapter that is used to convert for Osmo-Mobile 3/4 OM4 for 9. This OM3/4 adapter is molded with 3D printing technology and is 9 Black is dedicated and not for other cameras. Contains counterweight iron blocks, after the counterweight is balanced, it can reduce the pressure on the motor, make the picture smoother, and reduce the motor heating. Adapter Set only, other accessories in the picture is not included!