1). One cell Lipo at 3.7V 1, 000mAh offers 7- to 10-minute flight after fully charged. 2). High quality servo is prompt and precise in reaction. 3). Coaxial structure makes flying much stable and easy. 4). 4-channel transmitter with visible power indicator can avoid helicopter losing control due to the shortage of battery power, and support you to fly without any worry. 5). An optimal model for the beginner.