Specification: Input voltage: 14.8V constant voltage Screw paddle: 13x 7 APCStandard current: 43 A Working current: 50A (60s) Standard pull force approx.: 2500g Speed kv/v: 830kv 690kv Motor resistance: 0.023 Package included:1 x SS Series A3520 690KV 830KV Brushless Motor For DIY RC Drone RC Airplanes