Please be advised that these radio configurations (RC1, RC3) are not adapted for United States.
WS2118-00 is a cost-effective, high performance, ultra-low power, sub-1GHz and Bluetooth® low energy RF device. Very low active RF and MCU current and low-power mode current consumption provide excellent battery lifetime and allow for operation on small coin cell batteries and in energy-harvesting applications. The radio frequency supports Sigfox RC1 and RC3.
You can get the module and EVB online from Digikey:
End Product Certificate M_0045_D932_02
Dimensions (in mm): 22 x 24 x 2.8
Bluetooth Low Energy (BLE)
Max Tx Radiated Power: +16 dBm
Rx Sensitivity: -130 dBm
Power Supply: From 1.8V to 3.3V
Tx: 22.5 mA
Rx: 9.9 mA
Idle: 1.8 μA
A connector for an external antenna is available