High-performance MCU: Features Nordic Semiconductor's nRF52840 chip with FPU at 64 MHz, multiple development ports, and support for CircuitPython or MicroPython. Advanced wireless: Bluetooth 5.0 with built-in antenna and NFC. Efficient power: 5 A deep sleep consumption with integrated Li-ion battery charging. Expanded 20 GPIOs: Includes 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, mmWave, environmental), and actuators (ePaper display, LED matrix, relay). Color: Black Material: PCB Note: Product appearance may vary slightly by batch but does not affect functionality. Package includes 1 development board. Due to lighting and display differences, colors may vary slightly. Measurements may have a 1-3cm tolerance.