I've had one of these. They work pretty good for chasing the cat around the house, but the key words: IR, Infra-Red, not radio controlled! This means a) Forget about flying this outdoors and b) If the transmitter loses site of the 'copter, it will come down, fast! These are good for a few hard crashes, and you can also find replacement parts, plus instructions on how to fine-tune and adjust them, on many websites. But be warned that these are *not* a $200 RC helio. They sort of fly like a drunken moose - with practice, you can get them to fly fairly well, but a few good whacks on the ceiling causes the blades to bend/break, and then it flies like a pig, meaning not at all. Unless you call flopping to one side and crashing in seconds to be "flying". If that happens, start with a replacement tail rotor first, as it gets damaged more easily.