Nothing! Everything needed is included in the box.
The Blade® 120 SR heli has a fixed pitch 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-size Blade mSR heli, the sub-micro-size 120 SR heli 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 a Spektrum™ 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.
|Gross Weight:||3.75 oz (106 g)|
|Prop Diameter:||12.5 in (318mm)|
|Rotor Type:||Fixed Pitch Single Rotor|