Particle Boron IoT Development Board

QUICK OVERVIEW

1. Nordic Semiconductor nRF52840 SoC
2. ARM Cortex-M4F 32-bit processor @ 64MHz
3.  1MB flash, 256KB RAM
4. Integrated Li-Po charging and battery connector
5. Reset and Mode buttons
6. Dual-SIM support: Nano 4FF (unpopulated) and MFF2