YKS 250 Quadcopter Full Carbon Fiber Frame Kit RTF Racing Quadcopter with Remote Controller (Assembled) 250 Ready-to-Fly Quadcopter: Most of comments and parts have been assembled already; it is ready to fly after you installed the propellers (included) and plug the battery (included). Full Carbon Fiber frame kit, which is ultralight and great intensity. Support for HD camera, image transmission and other replacement components, you can DIY to change it as you wish. With FS-I6 remote controller, controller distance up to 700m.High sensitivity with fast speed (35 - 40km/h). Note: We have pre-assembled the 250 quad and tested it before shipped out.