High-performance MCU: Nordic Semiconductor's nRF52840 chip with 64 MHz FPU, multiple development ports, for Arduino/CircuitPython/MicroPython compatible Advanced wireless connectivity: Bluetooth 5.0 with built-in antenna and NFC support Onboard sensing: Integrated 6-axis IMU and PDM microphone, supporting motion sensing and audio input, ideal for wearable devices and compact ML applications Expanded 20 GPIOs: 9 additional 1.27mm pitch SMD castle pins beyond the standard XIAO nRF52840 With native TensorFlow Lite, it is the ideal development platform for your advanced embedded machine learning and AIoT projects Processor: Nordic nRF52840, ARM Cortex-M4 32-bit processor with FPU, 64 MHz Wireless connection: Bluetooth 5.0/BLE/NFC Memory: 256KB RAM, 1MB Flash 2MB onboard Flash Onboard button: reset button Onboard LED: 3-in-1 LED/charging LED Battery charging chip: BQ25101 Programming language: for Arduino/MicroPython/ CircuitPython The product appearance and printed words may vary depending on the batch, but this does not affect use. Colour:As Shown Material:PCB Package Contents: 1 * XIAO nRF52840 Sense Plus Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.