The EFR32xG21 Bluetooth Starter Kit supports Bluetooth 5.1 and comes ready to connect to your phone via the Silicon Labs Bluetooth LE mobile app. The EFR32xG21 2.4 GHz wireless SOC is optimized for line-powered BLE and Bluetooth mesh applications, including connected lighting, smart plugs, gateways and voice assistants. Based on Silicon Labs EFR32xG21 2.4GHz SoC with 1024K of Flash and an 80MHz Cortex M33 MCU, the 10dBm Radio Board plugs directly into the Wireless Starter Kit Mainboard which that provides for easy evaluation and development of wireless applications. Our software suite, Simplicity Studio, provides one-click access to design tools, documentation, software and support resources for Bluetooth development. Get up and running quickly with precompiled demos, application notes and examples. Use advanced tools including energy profiling and network analysis to optimize your wireless systems.