ALIGN T-REX 650X shows unique frame design, featuring a narrow upper frame, and wide lower frame for ample battery room. This design allows for an incredibly strong frame structure, ease of repairs, and a variety of battery options. Typical battery selections are 6s 22.2V 5000-6000mAh (Intermediate Flight), or 12s (2x 6s 22.2V) 3300-3500mAh (3D Flight) LiPo Batteries. The 650X incorporates many new other concepts such as an updated quick release battery tray system, vivid and bright colors for both the canopy and tail fin, and magnetic canopy mounts. Flight performance is the combination of high stability of the 700-grade helis and high agility of the 600-grade heli. With the included 800MX Brushless Motor, the 650MX will out perform some 700 class models.Features at a Glance: 650X rotor head with low CG design Advanced aluminum swashplate Accepts 600-650mm rotor blades 800MX 440KV Motor DS820M & DS825M HV Brushless Servos RCE-BL130A Brushless ESC Specification: Length: 1620mm Height: 356mm Width: 191mm Main Blade Length: 650mm Main Rotor Diameter: 1455mm Tail Rotor Diameter: 280mm Motor Drive Gear: 16T Main Drive Gear: 112T Autorotation Tail Drive Gear: 131T Tail Drive Gear: 34T Drive Gear Ratio: 1: 7.1: 3.85 Weight (RTF - Estimated, Depending on Set Up): 3320g Includes: (1) T-Rex 650X Dominator Kit (1) 650mm Carbon Fiber Blade set (1) 105mm 3K Carbon Fiber Tail Blade set (1) 800MX Brushless Motor (440KV) (3) BL820M High Voltage Brushless Servo (1) BL825M High Voltage Brushless Servo (1) BL130A Brushless ESC (1) Microbeast PLUS Flybarless system Needed to Complete: Transmitter (7-channel or more, helicopter system) Receiver (7-channel or more) LiPo Batteries: 6s 22.2V 5000-6000mAh - Sport Flying 12s (2x 22.2V) 3300-3500mAh - 3D Flight Digital Pitch Gauge Misc Building Tools & Supplies