Looks like they were in the warehouse for a log time. The motors make a squeaking sound due to dryness. added some machine oil and they are better now. They fly pretty high for the size but very difficult to control and takes time to get used to it. I have the other propel drone with cam which is pretty stable and much easy to control, may be because of the gyro sensors. Tip : Run it in speed 2 mode for better control.