BW&reg; 20Amp 20A ESC Brushless Speed Controller 2-3S LiPo for RC Airplane Quadcopter Multirotor Helicopter Professional 20A ESC for RC model Airplane Quadcopter Multirotor Helicopter 20 Amps continuous current, Burst Current (&gt;10s): 25A BEC output: 5V 2A. BEC mode: Linear Battery cell: 2-3S (Lipo) / 5-9 cells (NiMH) Weight: 23g. Dimension: 48mm x 26mm x 8mm.