WLtoys K150 Brushless RC Helicopter AS350 Squirrel Scale 4CH 6 Axis Gyro Battery Configuration:with three batteries spin the white main reduction spin the white main reduction drive gear and cyclic linkages by hand to guarantee no moving parts rub against the inner walls of the new shell Advanced Flight Control Superior Stability: The aileronless 3 blade system is designed using aerodynamic principles to provide self stability and strong wind resistance Designed for beginner pilots looking for a stress free entry into 4 channel flight and scale collectors who appreciate the fine details of the "Little Squirrel" AS350 air rescue model