3.30 mm, Analog, Top Port, Surface Mount, 2.0 Vdc, -44 ±3 dB, MEMS Microphone
Sierra Wireless AirLink RV55 Industrial LTE-M/NB-IoT Router (SKU 1104333)

Ultra-low-power Arm Cortex-M0+ MCU with 32-Kbytes of Flash memory, 32 MHz CPU, AES
Mainstream Arm Cortex-M0 Access line MCU with 32 Kbytes of Flash memory, 48 MHz CPU, motor control