It uses a GWS power system from one of my litesticks. I really like this model. It is an aerobatic, durable flyer. It can handle some wind outside, (about 5 MPH) and can be flown indoors. I haven't had the chance to fly indoors yet. It folds flat, and I made a coroplast box for it so I can take it to work and fly it at lunch easily. All I really need for field repairs is some thick CA and Kicker to glue the motor back on when it falls off in hard landings.