KDS450S is one of most popular products for R/C helicopter beginner. The kit adopts engineering plastic spare parts, all electronic accessories are professional equipment. When you want to upgrade the helicopter, there is no need to update these electronic accessories, but upgrade the spare parts to the corresponding parts of KDS450SV helicopter, which are compatible with the parts of most of the same class helicopter. KDS450S is the latest rare R/C helicopter. It features super flying functions, simple maintaining and great-looking appearance.