Length: 1114mm Height: 228mm Main rotor diameter: 980mm Main rotor length: 430mm Take off weight: 1800g Tail drive gear ratio: 56: 11 Motor gear ratio: 120: (16, 18, 20) Receiver supplys power by itself(battery: 7.4V, 1000-1200mAh, li-po battery) Transmitter: 6 channels or more, support CCPM helicopter control mode Gyro: KDS800 or head lock gyro with similar functions Servo: Futaba S9650, S3150, Hitec HS-85MG, or other 35g digital servoes with similar capability and same dimension for installation ESC: 80A 7.4V-22.2V Motor: KDS 2826 1100KV Battery: 4s1p 14.8V 3000mAh 15C 6s1p 22.2V 2200mAh 15C. Two groups in series or parallel connection: 22.2V 2200mAh 15C