RF Transceiver' mounting is done according to the Surface Mount method.There is an optimized performance in this RF Transceiver module because it utilizes the Tape & Reel (TR) package.
ETRX357-LRS-R8 Features
Surface Mount Tape & Reel (TR) package
ETRX357-LRS-R8 Applications
There are a lot of Silicon Labs ETRX357-LRS-R8 RF Transceiver Modules applications.