The Silicon Lab EF32 Flex Gecko SLWRB4251B Radio Board supports dual-band thanks to the integrated sub-GHz ISM band and the 2.4 GHz band transceivers. The sub-GHz section is designed to work in the European ETSI 433.05-434.79 MHz band with an external whip antenna. The 2.4 GHz section operates in the 2400-2483.5 MHz band with the on-board printed Inverted-F antenna.
The matching networks are optimised for +10 dBm output power.
The radio board can be attached to the Wireless Starter Kit Mainboard BRD4001A to offer a development platform for the EFR32 Flex Gecko Wireless System-on-Chips. Alternatively, the starter kit is available in our offer.

EFR32 Flex Gecko Wireless SoC with 256 kB Flash and 32 kB RAM (EFR32FG1P133F256GM48)
Inverted-F PCB antenna (2.4 GHz band)
SMA connector (434 MHz band)
Transmit power: +10 dBm
CPU core: ARM Cortex-M4 with FPU
Crystals for LFXO and HFXO: 32.768 kHz and 38.4 MHz
Ultra-low power operating modes
Fast wake-up times
Low power consumption

The Silicon Labs Flex Gecko 2.4GHz Wireless SoC Starter Kit SLWSTK6063A (RS 122-9764) is available to help kick start your next IoT project