The manufacturer/importer of this blue hat heli claims on the box that you can increase and decrease the speed of the main rotor with the remote control. Fact is however that you can only turn the main rotor motor on and off. At about half way up on the left remote, the motor kicks in at full speed.
On top of that problem, the switch reacts slowly. There is about a one second delay between what you tell it to do and the motor actually cutting off or turning back on. Don't even try to turn it on unless you have a wide open space as it will take off with full power on the slightest attempt to power up the main rotor. If you try to take the throttle back, it will turn the motor off completely and the landing is by design always a crash.
Buy it only if you want to build your own ceiling fan from the parts
