VVDI key tool plus Frequency keep change not stable, how to do?

VVDI Key Tool Plus

Have vvdi key tool plus to do “Remote Program”, why the Frequency is kept changing is not stable, mostly all remotes are same no matter what car or remote generate. If I generate a genuine key remote the Frequency is not changing is stable
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Xhorse chief engineer replied:
It is normal when you see the frequency keep changing, leave it alone, please continue to use it.

Good Luck!