I think it's the same as a walkera 4#3b, I got one for xmas, great fun but hard to fly, there is an art to flying one, it's in the take off, get it up 3 feet and it stead's out, power up slowly and give it some right cyclic as it goes light and as it comes back to level give it lots of power and then catch it, if you know what I mean,
Keep it tail on and take off from a very smooth floor, the tail get's court in carpet, I use a box laid out flat,
The better you can trim it the easier it is to fly,
If you can hover one of these than a 450 is easy,