This is a simple and small NANO IO shield. It breaks out all the pins of keyestudio Nano ch340, easy to hook it up to make experiments. Onboard comes with two 3mm fixed holes, convenient to fix the shield on other objects.
Terminal block spacing: 3.5mm
Female header pitch: 2.54mm
Dimensions: 53mm x 36mm
Weight: 20.5g
WIKI page tutorial