MCU – Raspberry Pi RP2040 dual-core Cortex-M0+ microcontroller @ 133 MHz with 264KB SRAM
Storage – 2MB QSPI flash
Connectivity – 802.11b/g/n WiFi 4 with ABRACON onboard antenna (Infineon CYW43439 connected over SPI)
USB – 1x Micro USB 1.1 port used for power and programming
Expansion
2x 20-pin 2.54mm pitch header and castellated holes with 26x GPIOs, 3x 12-bit ADC up to 500 Kbps, 2x UART, 2x I2C, 2x SPI, 16x PWM, 2 × programmable I/O (PIO) blocks with 8 state machines
3.3V I/O voltage
Debugging – 3-pin Arm Serial Wire Debug (SWD) port
Misc – BOOTSEL button, user LED (GP25. WL_GPIO0), RTC
Power Supply – 5V via Micro USB port or 1.8 to 5.5V DC via VSYS pin
Dimensions – 51 x 21mm
Temperature Range – -20°C to 70°C

https://www.nextinpact.com/lebrief/69536/voici-raspberry-pi-pico-w-a-6-dollars-avec-wi-fi-ainsi-que-pico-h-et-wh
6$