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Brushless 40A 2 4S ESC for Drone TIP122 Darlington NPN Transistor (Pack of 5) As students progress As students progress expect 30 50 meters effective range A Brushless 40A 2 4S Electronic Speed Controller (ESC) is a precision power management module that regulates current flow to brushless DC motors in multi rotor drones and quadcopters and commercial UAV operators rely on high quality ESCs to achieve stable flight dynamics
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