Specification:Brand: ALZRCItem: Devil 380 FAST RC Helicopter Kit Main Rotor Diameter: 856mm - Main Blade Length: 380mm - Tail Rotor Diameter: 196mm - Tail Blade Length: 75mm - Main Shaft Diameter: 8mm - Spindle Shaft Diameter: 5mm - Tail Shaft Diameter: 5mm - Tail Spindle Shaft ...Specification:Brand: ALZRCItem: Devil 380 FAST RC Helicopter Kit Main Rotor Diameter: 856mm - Main Blade Length: 380mm - Tail Rotor Diameter: 196mm - Tail Blade Length: 75mm - Main Shaft Diameter: 8mm - Spindle Shaft Diameter: 5mm - Tail Shaft Diameter: 5mm - Tail Spindle Shaft Diameter: 3mm - Motor Size - Maximum 41mm diameter, maximum height 41mm - Battery Compartment: 44x44x130mm - Weight: Appro:1100g(KIT)Radio Transmitter And Electronic Equipment Required For Assembly - Transmitter: 6-channel or more,helicopter system - Receiver: 6-channel or more - Pitch Gauge: Digital Pitch Gauge - Battery: 6S/22.2V 1500~2600m - Ah Li-Po Battery - Motor: RMC-BL3120 1000kv 6S Brushless Motor(5mm spindle) x 1ESC: 50~80A Brushless ESC x 1Swashplate Servo: CCPM Micro Digital Metal Servo x 3Tail-lock Servo: Medium Digital Metal Servo x 1Gyroscope: Flybarless Gyro System - Other: Plug Assemble Tools Set - Note: Package is only included the helicopter kit, need to prepare transmitter and other electronic components yourself, such as ESC, battery, servos, etc