Description: [Size]: Compact in size with a side length of 30.5mm, making it suitable for various drone models without adding excessive weight or bulk. [Material]: Made of electronic components, ensuring durability and long time to use performance. [Features]: Drone FC Stack with high performance, simple and convenient to use. [Application]: Flights Controller Stack for RC drones quadcopter accessories. [Function]: The flight controller, providing everything you need to upgrade or replace the existing flight control system on your drone. Specification: Material: electronic components, Size Chart: 3.05cm/1.20inch Package Includes: 1 Flights Controller Stack Part Note: Please allow slightly errors due to manual measurement and different monitors. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store