... ,ROHS,FCC,ASTM DH9074 RC Metal Helicopter with GYROFeatures: Built In Gyroscope For Maximum Stability Electric Powered 3.5 Channel Radio ControlMetal ... Diameter: 12 InchesLength: 14 InchesWidth: 4 InchesHeight: 6 InchesBattery Requirements: Helicopter: 3.7V 800mAh Li-Poly Rechargeable Battery (Included)Transmitter: 8 ...