Silicon Labs SLWRB4179B Radio Board provides an ideal development platform to evaluate the EFP0104 wired buck PMIC and the EFR32xG21 wireless SoC. The EFP0104 supports a wide range of batteries from 1.8V to 5.5V providing flexibility for different battery technologies and improves the power-consumption efficiency of the EFR32xG21. The SLWRB4179B radio board supports up to 10dBm output power for 2.4GHz wireless technologies including Zigbee, Thread, and BLUETOOTH® Low Energy. This radio board is a complete reference design for the EFR32xG21 wireless SoC with a matching network and a PCB antenna.