High-performance MCU: Features Nordic Semiconductor's nRF52840 chip with FPU at 64 MHz, multiple development ports, and support for CircuitPython/MicroPython. Advanced wireless: Bluetooth 5.0 with built-in antenna and NFC capability. Efficient power: 5 A deep sleep consumption and integrated Li-ion battery charging. Expanded GPIOs: 20 GPIOs including 9 extra 1.27mm pitch SMD castellation pins. Universal compatibility: Standard backside layout for future expansion boards. Compatible with XIAO accessories: Supports expansion modules (LoRa, CAN Bus, RS-485), sensors (mic array, vision AI, motion, environmental), and actuators (ePaper, LED matrix, relay). Color: Black Material: PCB For XIAO nRF52840 Sense Plus Note: Minor variations in appearance or print may occur between batches, but functionality remains unchanged. Package includes: 1 �� Development board Disclaimer: Slight color differences may occur due to lighting or display settings. Measurement tolerance: ��1-3 cm.