Designed to reduce vertical shaking caused by natural arm movements when walking or jogging the z axis is for use with the dji osmo it is a spring loaded hinge that attaches the camera and the handle together featuring a small knob that regulates spring tension the dji z axis does not require any power source as it is a mechanical attachment it is not intended for action sports that involve extreme movement and is not compatible with non dji devices or the osmo bike mount extension rod