KDS450SV is a new style helicopter with direct link configuration. It features laconic looking, simple maintaining. The washplate servo is external, which makes the maintance simple and easy. Small gear drives the tail gear directly to reduce the exhaustion of power. At the same time, players can adjust the position of the battery back and forth to change the barycenter of helicopter. With high functions dual rate&head lock gyro, powerful motor, and high multiplying power battery, the helicopter provides you with funny and interesting flying.