Specification: Kv (rpm/v): 900 Power(W): 770 Wire winds: 5 Resistance(mΩ): 40 Idle current(A): 1.5 ESC(A): 60 Cells Ni-Cd / Ni-MH: 9-18 Cells Li-PO: 3-6 Prop: 11*8 / 13*6 / 14*7 Weight: 170g