Blade CX3 MD 520N RTF Micro Helicopter Advanced 3-in-1 control unit including main motor ESCs, mixer and heading lock gyro The heading lock gyro in the CX3 offers incredible hold and control to maximize your flight experien Interference-free, 5-channel E-flite transmitter with built-in Spektrum 2.4GHz DSM2 technology Lightweight Spektrum AR6100e receiver with DSM2 technology Two feather-light S60 Super Sub-Micro servosjust 6.0 grams each