The number 1 reason the Spektrum and Futaba equiptment is so good and safe is due to their channel switching abilities, and capabilities to block out any other TX or 2.4ghz signals. These cheaper sets dont give any information on how they actually work. COnsidering both Spektrums and Futaba's methods are patented, and the extreamly cheap and basic price of this TX set i wouldnt be too quick to jumo on and say theyre just as good and safe because they say 2.4ghz .
Lots of other 2.4ghz equiptment suffers interfeirence.