describe:1. RC Plane Ready to Fly: This version includes everything needed to start the model, requiring only the transmitter battery. It comes fully assembled for quick takeoff and comes in portable packaging so you can take it with you wherever you go.2. The propeller uses aerodynamic principles to provide strong power and self-stability of the body. Simple 4-channel, stabilized by 6 gyroscopes, especially suitable for beginners to fly.3.4-channel remote control, low-voltage alarm, stall protection, loss-of-control protection, rudder size conversion, button take-off, button landing and other functions;4.8520 main coreless motor and 0615 tail coreless motor, 2 3.7V 300mAh 25C high-rate lithium batteries ensure long-term flight.5. Super simple, super fun: The helicopter has calibration function and low battery protection to ensure that your helicopter will not be damaged due to power outage. It is small in size, fast in operation, easy to control, and the blade is not fixed, making it very suitable for children and beginners.Specification:Material:: 3.7V 300mAh (2 pcs)Frequency: 2.4GChannel: 4CHPower port: USBCharging time: about 60 minutesflight durationRemote control distance: 80-100mController mode:Mode 1: Right hand throttleMode 2: Left hand throttleHelicopter dimensions (length x height): 267x80 mm/10.51x3.15 inchesRotor diameter: 248mm/9.76 inchesPackage includes:1 piece rc helicopter1 remote control1 user manual1 piece USB charger1 piece main propeller1 piece tail rotor2 pieces connecting rod2 lithium batteries1 piece screwdriver1 piece hex wrenchnotes:Please allow slight size differences due to different manual measurements.