Please be advised that these radio configurations (RC3, RC5) are not adapted for United States.
The SFM11R3 Sigfox Only mode module is a miniaturized module (13.0 x 15.0 x 2.21 mm) for RC3 (Japan)+RC5(Korea). The module has an integrated MCU as well as an integrated RF transceiver and supports UART for external communication. Module samples are available upon request.
TCXO is used on the module to keep the frequency tolerance for operational bands all over the product life
End Product Certificate M_0042_9D8D_01
Direct buy link: http://support.seongji.co.kr/global-distributors-2019/
Dimensions (in mm): 13.0 x 15.0 x 2.21
Max Tx Radiated Power: +13 dBm
Rx Sensitivity: -127 dBm
Power Supply: From 2.1V to 3.6V
Tx: 47 mA
Rx: 13 mA
Idle: 2 μA
No connector for an additional external antenna