Adopting the RP2040 microcontroller chip designed by Dual-core ARM MO+ processor, running at up to 133MHz flexible clock Built-in 264KB of SRAM and 4MB of on-chip Flash. True stamp hole design allows direct solder integration into -designed backplanes, USB1.1 and device support. Product Features Low power sleep and hibernation modes supported Drag-and-drop download for storage via USB recognition 29 GPIO pins of RP2040 (20 pins can be pinned out via pins, the rest can be soldered out only) SPI*2, I2C*2, UART*2, 12-bit *4, PWM*16 Precise on-chip clock and timer Temperature sensor On-chip accelerated floating point library 8 programmable I/O (PIO) state machines for custom peripheral support size: 25.5 x 18mm : PCB colour: blue Package Contents: 1 x RP2040 Development Board Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.