It is a entry level model for F3C competition. It is very similar to SST Eagle but with plastic head (it is a FFZ head) and not in metal and other minor difference like the belt tail (always in plastic).
The box is huge like the others Hirobo helicopter of that time and i love it.
I also own the SST Eagle DDF. See the link below.
http://japan-hobby.blogspot.it/2014/10/hirobo-eagle-ddf.html