... permanent magnet, 2.53.5A/hrDrive:the rotor is entire stainless steel, and airscrew is 6.35CmTurning:Entire stainless steel workInflatable parts ... :polyester of thickness is 28 layers, red, yellow, blue.Bracer of battery: package ... board, so easy carryingWeight of boat:12Kgs(only the boat, not include battery)Battery:34A /hr .Can charge ...