Door Opener and Automatic Door Operators Turbular Motor Controller

Frequency:433MHz Material:PVC Modulation system: amplitude ASK/OOK Receive Sensitivity(dBm):-95DB Working Tempeture: -10℃~+70℃ One kit:one controller + two pcs transmitters Communication range:normally 50-100meters,test it base on actually circumstance The receiver can work with one channel and three channel. You can judge it by the LED flash, the LED flash once and off,it is one channel, the LED flash three times and off, that means it is three channel. One channel:When button A learned in the controller,press button A once it open, press button A again it stop, press button A the third time it close.So same with button B/C/D,that mean one remote can control four gates Three channel:How to change it to three channel?Press button D once, then press A and B at the same time, then press the button C. When the LED flash three times and off, that means it is three channel. Function:Press button A it open, press button C it stop, press button B it close.