With a size that falls in-between large and small models, the T-REX 550 features the best of both worlds. Now the T-REX 550L Dominator has a superior power plant that will produce jaw dropping to the ground level performance. The T-REX 550L utilizes composite material integration technology on carbon side frame plates. Adding battery mounting rails and top mounted motor base design makes assembly easy. Designed with direct servo CCPM control, and a single piece main bearing block with integrated servo mounts; plus equipped with the low CG DFC rotor head, exhibits exhilarating 3D performance and unimaginable flight speed. A high quality new tail gearbox design, combined with new dual point mounted tail pitch control assembly minimizes slop and increases rudder control precision. T-REX 550L Dominator is equipped with 730MX 850KV motor with a unique DOMINATOR paint scheme and extremely efficient and powerful output. Brand new high voltage brushless BL815H/BL855H servos feature high torque and efficiency with blazing speed and higher precision. They also stay cooler which not only can extend the service life but has made them the preferred choice with all of our factory pilots. Lastly this kit features the Gpro flybarless system with active CPU, processing 20 times faster than previous generation. The new software structure improves system compensation, and with the latest iOS and Android APP can be easily and directly adjusted through mobile phone while at the field. New human oriented interface allows convenient and rapid setup and installation.