High quality brushless motor with neodymium magnets and dual bearing. Specifications: RPM x Volt.: 800. Internal resistance: 50 Ω. Load consumption: 2.1 Ah. Maximum consumption: 50 Ah. (60 sec.) Axis: 5.00 mm. Dimensions: 42 x 47 mm. Effective power: 830 Watts. Weight: 200 grams. LiPo: 4 S. Recommended Propellers: 4S 12x6 ". Recommended: models from 1,500 to 2,500 grams. weight