The module is safe, reliable and scalable to a of applications The expansion board adopts a double-layer design with pin headers on both sides Good stability and high reliability This breakout board can expand the 1 GPI0 pin of the ESP32-S3 board to 2, perfect to reuse all pins and a great tool for your projects Made of high-quality materials, sturdy and Number of PCB layers: 2 layers PCB thickness: 1.6mm Model: ESP32-S3 Applicable: Suitable for N8R2 N16R8 development board Depending on the batch, the printed words on the product will be different, which does not affect use Colour:Black+Green Material:Plastic Type: A: ESP32-S3 expansion board + N16R8 development board Package Contents: 1x Expansion Board 1x N16R8 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.