How to solve Audi 754J Smart Key short distance remote lock/unlock on car

Xhorse VVDI 754J Smart Key is suitable for Audi, and we received feedback that:

Why this key works only on short distance remote lock/unlock on car

5 meters

Original work from 12-15 meters

Which of those options is for signal strenght?
Maybe i can fix xhorse key with this options?

The option choose in database

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Here is the suggestion from Xhorse Engineer:

Please check in special function>>VVDI remote function>>smart key customization

define 3 (0-20) or define 4 (0~8) to modify the sensitivity

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