The captainrc wind series 40A Electronic Speed Controller (ESC) is a powerful little ESC that runs great and doesn’t get hot like other ESCs! This ESC comes pre-installed with 3.5mm bullet plugs and XT60 plugs so you don’t have to solder the plugs yourself! SPECIFICATIONS Max/Peak Current: 40A/55A Battery:/2-4Lipo BEC Output: 5V 6V/4A Dimensions (L*W*H): 2.68*0.98*0.39 inches Weight: 0.082 lbs Motor Type: Brushless Motor