The Hobbywing Skywalker 40A Brushless ESC is specifically designed for RC airplanes, fixed-wing aircraft, and multi-rotor drones. It integrates multiple protection features to ensure your model flies safely and stably. Whether you're a beginner or an experienced pilot, this ESC delivers exceptional performance and reliability. Key Features & Benefits Safe Power-On Protection: The motor won't start immediately when powered on, regardless of the throttle stick position, preventing accidental injury. Throttle Range Calibration: Adaptable to various remote controllers, it ensures a linear and precise throttle response for a smoother flying experience. Comprehensive Protection: Built-in undervoltage, overvoltage, overheat, and signal loss protection provide all-around safety for your equipment. Programmable Settings: Easily customize parameters like brake settings, battery type, low-voltage cutoff mode, and start-up mode to perfectly match your model's needs. Optimized Design: Features a core program optimized for disc-type motors and a twisted-pair throttle signal cable to effectively reduce signal interference and enhance flight stability. Specifications Model: Skywalker-40A Continuous Current: 40A Burst Current: 55A (>10s) BEC Mode: Linear BEC Output: 5V / 3A Battery Cells: 2-3S Lipo / 5-9 cells NiMH Weight: 39g Dimensions (L x W x H): 68 x 25 x 8 mm Connector Type: XT60 Plug