RC ERA C187 2.4G 4CH 6-Axis Gyro Optical Flow Localization Altitude Hold Flybarless Scale RC Helicopter RTFSpecification: Product size (MM): Rotor diameter: 256mm Body length: 257mm Height: 81mm Flying weight: 105g Packaging weight: 650g Flight time: 13 15 minutes Charging time: About 40 minutes Remote Control Distance (M): 80 100M Features: 1 Aileronless design, the propeller is designed based on aerodynamic principles to provide strong power and self stability of the body. Simple 4 channel design, ultra stable flight with 6 axis gyroscope; 2. The