Multi Rotor Parts BLHeli 30A Brushless ESC For Quadcopter Features:Use authentic electronic components to ensure high quality and enhance the current endurance ability of the ESC.Based on BLHeli firmware,optimized for high performance with great linearity and much quicker throttle response. Special designed for multirotors, and compatible with great linearity and much quicker throttle response.Multiple protection featured including Low-voltage vut-off protection/ over-heat protection/ throttle signal loss protection.Throttle tange can be configured and is full compatible with all receivers, providing smooth with all receivers,providing smooth,linear and precise throttle reponse.All parameters can be programmed via using a program card or a transmitter,including default settings. Product specification: Item:EMAX Blheli 30A Continuous Current:30A Burst current(10S):40A Li-xx battery(cell):2-4 Dimension L*W*H(mm):52x26x7 BEC Mode: Linear BEC Output:2A/5A Programmable:yes Package includes: 4 pcs * Emax BLHeli 30A Brushless ESC Electronic Speed Controller