Features: - The rocker speed controllers help keeping even speed and getting smooth footage. - 4 gears adjustable and 360° rotatable, thus fly angle of drone can be freely and precisely controlled. - Apply to multi kinds of timelapse like cloud flow, water flow and traffic. - The lengthen control stick swings more at the same angle, so it is more precise and stable to control. - High-viscosity double-sided tape. You can heat the tape to restore its stickiness with a hair dryer, if using again after a long time. Specifications: Name: Speed Controller & Lengthen Rockers Compatible models: for DJI RC Material: Plastic + Aluminum Alloy Gross weight: 16g Packing size: 150*110mm