Description Features: brand new and high quality Broad compatibility: Pins for Seeeduino XIAO and supportsSeeeduino XIAOs Expansion board. Easy project operation: Breadboard-friendly SMD design, no components on the back. Flexible compatibility: Support Micropython/for Ar duino/CircuitPython. Multiple interfaces: 11 digital pins, 4 analog pins, 11 PWM Pins,1 I2C interface, 1 UART interface, 1 SPI interface, 1 SWD Bonding pad interface. Powerful MCU: Dual-core ARM Cortex M0+ processor, flexible clock running up to 133 MHz. Rich on-chip resources: 264KB of SRAM, and 2MB of onboard Flash memory. Small size: As small as a thumb(20x25mm) for wearable devices and small projects. Package Includes: 1PC x RP2040 Chip Specifications: CPU:Dual-core ARM Cortex M0+ processor, flexible clock running up to 133 MHz Storage:264KB of SRAM, and 2MB of on-board Flash memory I/O PINs:11 digital pins, 4 analog pins, 11 PWM Pins Interface:1 I2C interface, 1 UART interface, 1 SPI interface, 1 SWD Bonding pad interface Power supply and downloading interface: USB Type-C interface LEDs: 1 user LED, 1 power LED, two LEDs for serial port downloading, 1 RGB LED button: 1 RESET button, 1 BOOT button Power Pads: For the battery power supply Software compatibility:Support Micropython/for Ar duino/CircuitPython Projection cover for protecting the circuit Size: approx. 2.5x2cm/0.98x0.79in note: Please allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you