The RT28 is okay when receiving an alarm, but how does one enable the RT28 alarm function to transmit?

Dear,please download RT28 software and USB driver from our official website: https://www.retevis.com/resources-center after you install the software,please cleck "edit-Optional Feature-side key"select "alarm‘ ,after select,you need click"Program-Write data to radio". Then you press side key,your radio can transmit alarm function.
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