Adjust the TX power of 900hp-S3B-Pro Wireless modem

Hi, I am using wireless sensor network in which 900hp-S3B module is used, I need advice on how to adjust the TX power of these modules?
suggestion on this will be appreciable.

900hp-S3B module - https://store.ncd.io/product/900hp-s3b-long-range-wireless-mesh-modem-with-usb-interface/