I like to call my Tello drone "Mosquito". He sounds like a mosquito every time he flies but is the loudest mosquito I've ever heard of. He can rotate up to 28,000 RPM at an impressively low 3.7 Volts at maximum (no joke). He also is able to fly up to 30 meters above ground without any range extender. It's scary so I would prefer flying him at only 10 meters.