IoT Front-End Modules (FEM) Skyworks Solutions Inc. IoT Front-End Modules (FEM) provide compatibility with multiple wireless standards and SoCs/RFICs in a single RF module. The IoT FEM is ideal for wireless connectivity, allowing ZigBee, Thread, and Bluetooth® standards, with BLUETOOTH® 5 included. The IoT FEM is an efficient Internet of Things (IoT) solution when paired with a System on Chip (SoC) platform, resulting in longer battery life and extended transmission range.