Features: The F405 40A Flight Controller integrates 40A with flight algorithms, delivering powerful 3-6S battery for FPV drones controlling and reduced wiring complexity. Features easy installation, high efficiency cooling system, and signal reception with 30% extended for operational in challenging environment. Ideal for FPV racing enthusiasts, pilots, and DIY drones builders professional grade flight controllers with integration for competitive edged. Perfect for fast speed track maneuvers, outdoor acrobatic flights, and extended where stability and signal reliability is critical. Engineered with component and optimized channel, this flight controller maintains consistent during prolonged battery operational while preventing overheating failures. Specifications: Product Name: F405 Main controlling chip: STM32F405 Size:Approx.33x33mm/1.3x1.3inch Package Includes: 1 set of F405 40A Flight Controller note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual of the item.