Accessories & Parts -30A 40A Brushless ESC Elements Accessory Highlights Generic Brand 30A 40A Brushless ESC Elements Accessory Description: Professional 30A Brushless ESC Speed Controller for RC Helicopter Quadcopter Multirotor Top quality components for high current endurance . Regardless of the position of the throttle stick, the motor will not run after the battery is connected. Low voltage cut-off protection / Overheat protection / Throttle signal lost protection. The throttle range can be configured to provide the best throttle linearity. Specification: Material: Metal Color: As pictures show Number of Packages: 2 Package Include: 2pcs 30A 2-4S Brushless ESC Speed Controller Note: Due to manual measurement, there may be some error of 1-2mm in size. Due to the difference between different monitors, the picture may not reflect the actual color of the item.