Features: Powerful CPU-,the Seeeduino XIAO is equipped with an ARM Cortex-M0+ 32bit 48MHz microcontroller, which is three -times faster than Arduino-compatible Uno- and Nano-. This Arduino-compatible and IDE- board has 256KB flash memory and 32KB SRAM-. Seeeduino XIAO is the smallest Arduino-compatible board in the Seeeduino series. The device has 14 GPIO pins-, each of which has 11analog channels, 11 digital channels, I2Cx1, UARTx1, and SPIx1, USB-Type-C interfacex1 in a tiny space, just 20mmx17.5mm (about the size of your thumb). Suitable for wearable devices, rapid prototyping, DIY keyboard-, USB to multi-channel TTL-/USB host mode-, etc. Specifications: Item:Seeeduino XIAO Development Board Chipset: SAMD21 Size:approx 20x17.5mm/0.79x0.69in CPU-:ARM- Cortex-M0+CPU(SAMD21G18) 48Mhz Storage: 256KB Flash 32kb SRAM- I/O- pin: 14GPIO , 11analog and digital, 1 DAC function, 10 PWM function, 1ge12C, 1 UART, 1 SPI-, Interface: USB-Type-C power supply and download interface 1 user light 1 power-light, 2 download light Reset- interface Note: The color deviation might differ due to different monitor settings, please kindly understand. There might be little error of size for manual measurement. Package includes: 1 Set Seeeduino XIAO Development Board