Retevis RB618 Outdoor Discovery Rechargeable walkie talkies, what should I do when I can't write certain frequency bands?
First: Domnload rb168 programming software
Second: Input the frequency on the programming software, save the input frequency as a file, open the file, change the "." of the input frequency to ",", open the changed software with the programming software, and read the frequency.
More details click: https://www.youtube.com/watch?v=6jz6FP1Lr_c