The RF Board' packaging Bulk provides high reliability.RF Type Transmitter from the Evaluation board.As you may know, this RF Board comes from the well-known EZRadioPRO® series product line.
4031-T-B1_B_868 Features
Transmitter Type
4031-T-B1_B_868 Applications
There are a lot of Silicon Labs 4031-T-B1_B_868 RF Boards applications.