About this item HJ 450 Multicopter 450F nylon Fiber Frame Airframe kit Strong Smooth RC KK MK MWC DIY Quadcopter plane 30A Brushless ESC Speed Controller For RC Quadcopter Hexacopter Radiolink AT9 2.4GHz 9 Channel Transmitter Radio & Receiver TX &RX for RC Toy Helicopter Before Producing, The Manufacturer Have Set Up The Program, The Esc Do Not Need Additional Program. This ESC Do Not Have The English Instruction