Specification: 1)．Main Rotor Dia. A : 610 mm 2)．Main Rotor Dia. B : 623 mm 3)．Overall Length: 666 mm 4)．Brushless Speed Controller: WK-WTS-40A-1 5)．All-upWeight: 833g (Battery included) 6)．Brushless Motor: WK-WS-28-007W 7)．Gyro: Built-in
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