ESP32-PICO-D4: Standard ESP32-PICO-D4 module soldered to the ESP32-PICO-KIT V4 board. The complete system of the ESP32 chip has been integrated into the module, requiring only external antenna with LC matching network, decoupling capacitors and pull-up resistors for EN signals to function properly I/O: All the pins on ESP32-PICO-D4 are broken out to the pin headers on the board. Users can ESP32 to enable multiple functions such as PWM, , DAC, I2C, I2S, SPI, etc. for details see section Pin Descriptions What you will : 1PCS ESP32-PICO-KIT Colour:Black Material:PC + metal Size:5 x 2cm Package Contents: 1* 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 picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.