The two axis spring arm SERENE attaches at the end of the Easyrig arm. It stabilizes vibrations and motion errors on the vertical axis that comes from walking or running with the rig and also side-to-side errors by counter pivoting around its center axis.
Very easy to mount on the Serene arm. Comes with an extra Easyrig cord. The extension arm includes an extra heavy-duty spring, for heavier rigs, keeping the total range between 3 - 19,25kg.