1) D2623-4500 : KV: 4500, Volatage: 7.4v , Prop:APC 4.1x4.1 , Current: 19.2A , Speed: 20300rpm , Pull : 230g , Max current <60s: 20.5A , Application: 250# heli 2) D2623-1500: KV: 1300, Volatage: 11.1v , Prop: 7x5 , Current: 8.2A , Speed: 8400rpm , Pull : 310g , Max current <60s: 9.1A , Application:miniplane