Features: Universally Brushless Motor Speed Controller Compatible for 1S to 2S/2S~3S Libatteries and offering 4A, 6 a, or 8A current option for versatile project power needs. Features a compact design, utilizing advanced algorithms for precise speed control and smooth motor operate in space constrained installations. Ideal for electronics hobbyists, Rremote modelers, and enthusiasts working on brushless fan, drones, or complex model aircraft systems requiring reliability external power management. Perfect for high performances applications like cooling fan in compact electronics or providing responsive thrust control in miniature drones and lightweight air models. Simplifies setup with clear wiring markings on its durability PCB, ensuring quick integration for stable operate across various electronic projects requiring miniature ESC solution. Specifications: Component: PCB, metal 4A Size:Approx.21.5x7mm/0.85x0.8in 6 a Size:Approx.20.5x7mm/0.84x0.8in 8A Size:Approx.21.5x7mm/0.85x0.8in Option Type: 1S~2S 4A,1S~2S 6 a,2S~3S 8A; Power supply current: 4A/6 a/8A Support 1104 1106 1306 1407 1503 Brushless Motor; Applicable scenario:Drones,Model aircraft,Brushless fan; Package Includes: 1pc Brushless Motor Speed Controller note: Please allow 1-3cm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual item color.