“The instruction “4-CH DIY433 MHz module Transmitter {No coding}” introduce how to build simple four channel DIY transmitter using 433 Mhz Tx module.
Generally,this kind of devices in the market using for car/motorbike thief-alarm remote.We can apply them to control RC toy like cars,tracked robots,boats or even airplanes.It doesn’t need any programmable controllers or coding sketch.The wireless modules are small and light,good for using to control tiny ground toys,park flyer planes or replacing old broken electronic toy remotes.”