Factory-assembled electric helicopter of GRP / aluminium construction, with collective pitch.This kit comes in Metal case, which can accomodate the heli and transmitter as well.This pre-assembled miniature electric helicopter is supplied in a high-quality aluminium case which really does justice to the model s name. The carefully considered use of GRP and aluminium achieves the highest possible airframe strength combined with minimum weight. The result is a reliable helicopter with minimum possible maintenance requirement. Whether you are a beginner or a 3-D freak, and whether you fly indoors or out, you will be delighted with the Crown III.Specification: Main rotor diameter: 630 mm All-up weight: 545 g Height: 210 mm Length: 570 mm