The KDS 450SD, as one of the members of KDS 450 class helicopter series. It is a perfect 3D electric helicopter which features priecous metal parts and excellent functions electric equipment. The full fuselage features streamline design. It cleverly utilizes frame space and also creates a minimalistic beauty. Utilize bevel gear driving enhanceing the driving efficiency of helicopter significantly. New tail blade control set utilizes ball joints connecting method, which makes the heading hold function play fully.