BW&reg; 4Pcs New Generation OPTO 30A Brushless Speed Control 2-6S LiPo SimonK ESC for DJI Multicopter Qudcopter Airplane (4) 30 Amps continuous current, up to 40 Amps burst. Super smooth and accurate throttle linearity Safety thermal over-load protection Extremely low internal resistance Fit for 2-6s LiPo battery. Contains No BEC.