Blade 120 SR RTF Key Features Sub-Micro size 100% factory-assembled, test-flown and ready-to-fly right from the box Unique rotor head designed specifically to provide inherent stability of a coaxial helicopter, but provide the agile control of a single rotor helicopter Factory installed 5-in-1 control unit with Spektrum 2.4GHz DSM2-compatible receiver, main motor ESCs, mixer, gyro and fully proportional servos Overview The Blade 120 SR is a fixed-pitch heli that will give you the confidence to master the basics of single-rotor flight. Its unique rotor head was specifically designed to provide the inherent stability of a coaxial helicopter, but provide the agile control of a single rotor helicopter. Modeled after the popular ultra micro-sized Blade mSR, the sub-micro-sized 120 SR is larger, faster, and more powerful -- which makes outdoor flight a reality. It comes out of the box 100% factory built and equipped with a factory installed 5-in-1 control unit with Spektrum's 2.4GHz DSM2-compatible receiver, main motor ESCs, mixer, gyro, and fully proportional servos. A ready-to-fly version with 2.4GHz DSM2™ transmitter and a Bind-N-Fly® version without transmitter, for those who already own a DSM2 aircraft transmitter, are available. Both include a 1S 500mAh Li-Po battery and a single-cell, variable rate Li-Po charger as well as an AC power supply. Needed to Complete Nothing! Everything needed is included in the box.