Arduino Nano 33 BLE [ABX00030] Price: $23.00 (as of 23/11/2020 03:35 PST- Details)

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Designed for short range BT interactions and power savvy projects
Small (48mm x 18mm) and robust board is built around the NINA B306 module, based on Nordic nRF 52840 and containing a powerful Cortex M4F