Constant speed orientation, mirror movement. Stable control of the amount of stick, and silky images. The stroke volume can be adjusted in four gears, and the 360 rotating adjustment gear can precisely control the stroke volume and flight angle. It is suitable for a of time-lapse scenes, and can , water, , etc. Used with an extended aluminum joystick, the control is more precise and the action is more stable. The stroke volume can be adjusted in four gears, and the 360 rotating adjustment gear can precisely control the stroke volume and flight angle. It is suitable for a of time-lapse scenes, and can , water, , etc. Used with an extended aluminum joystick, the control is more precise and the action is more stable. High-viscosity double-sided tape, no glue left after repeated use. To use again after a while, just heat it with a hair dryer or heat to the stickiness. Colour:grey :Metal Package Contents: 1 speed control device 1 pair of rockers 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 a little different from the real thing. The measurement allowed error is +/- 1-3cm.