Features: PowerfulCPU-,the Seeeduino XIAO is equipped with an ARM Cortex-M0+ 32bit 48MHz microcontroller, which is three -times faster than compatible UnoandNano This compatible andIDE board has 256KB flash memory and 32KBSRAM Seeeduino XIAO is the smallest 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). The Seeeduino XIAO development board is perfectly compatibleIDE and you can easily create small projects using the extensive and comprehensive compatible library. Suitable for wearable devices, rapid prototyping, DIY keyboard-, USB to multi-channelTTL-/USB host 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 Package Includes: 1 Set Seeeduino XIAO Development Board note: The color deviation might differ due to different monitor settings, please kindly understand. There might be little error of size for manual measurement.