DO NOT BUY THIS. unless you like buying things that don't work well. I did a lot of research on microdrones before making this purchase. Most videos and reviews praise the value and quality of this quad, but unfortunately my experience is not that good. I actually bought 2 of these and was VERY disappointed in both. They were great initially, synced to the transmitters with ease, and flew out of the box pretty well. The problem is that it's IMPOSSIBLE to stop it from drifting. I've followed the calibration instructions over and over again, but it still drifts horribly to one side. It's so bad I can't even compensate with the joystick. If this was just an issue with one of the quads I would just attribute it to a faulty drone, but both quads have the same issue. I also bought some extra blades, batteries and motors for it, knowing that everything would inevitably fail and need to be replaced. However, it looks like they won't be needed since this quad can't fly, making all those extra parts useless. My advice to anyone looking to buy one of these quads is to save money and buy something that actually works. I wish I had!