Radio System: 4 channels or more (7 with quad flaps). Motor: Power 25 Outrunner or Power 32. ESC: 40A-60A brushless (depending on battery and prop used). Battery: 10-cell 12.0V 1800mAh Ni-MH or 3-cell 4200mAh Li-Po . Servos: 4 JR Sport MN-48 (JSP20040) .