EFR32BG1 Series 1 modules are designed for Bluetooth 5.x applications where ultra-small size, high-performance RF, low-power consumption, full modular approval and easy application development are key requirements. With a 2.4 GHz EFR32BG1 Series 1 wireless SoC, a high-efficiency antenna, and our certified Bluetooth software stack, EFR32BG1 Series 1 modules minimize the time and effort typically required for complex RF designs. Supported also by our best-in-class development tools, the modules enable quick time-to-market for space-constrained and energy-sensitive IoT applications. BGM11S and BGM121 SiP modules are the worlds smallest complete Bluetooth solutions.