Product selling point:1. Using high-quality materials, the quality is guaranteed2. Powerful MCU: Dual-core ARM Cortex M0+ processor with flexible clock running up to 133 MHz3. Rich on-chip resources: 264KB SRAM, 2MB onboard Flash4. Flexible compatibility: support Micropython/Arduino/CircuitPython5.Easy project operation: Breadboard friendly and SMD design, no components on the back6. Small size: as small as thumb (20x17.5mm), suitable for wearable devices and small projects7. Various interfaces: 11 digital pins, 4 analog pins, 11 PWM pins, 1 I2C interface, 1 UART interface, 1 SPI interface, 1 SWD Bonding pad interface8. Wide compatibility: pin compatible with Seeeduino XIAO and support expansion board for Seeeduino XIAOParameter:CPU: Dual-core ARM Cortex M0+ processor with flexible clock up to 133 MHzStorage: 264KB SRAM and 2MB onboard flashInput/Output pins: 11 digital pins, 4 analog pins, 11 PWM pinsInterface: 1 I2C interface, 1 UART interface, 1 SPI interface, 1 SWD pad interfaceButtons: 1 RESET button, 1 BOOT buttonPower supply & download interface: USB Type-C interfaceApplication:Wearable deviceRapid prototyping (direct connection to extended PCB as minimal system)Perfect for all projects that require a mini ArduinoDIY keyboardUSB development (USB to multi-channel TTL/USB host mode, etc.)Package Included:1* Development board