기존에 제로 W 사용할때 GPIO핀이 없어서 납땜이 필요했었는데 이제부터는 처음부터 핀을 달고 판매를 하네요,
The difference between this edition and the current Pi Zero W is its pre-soldered GPIO header. This makes it much easier to start prototyping with a Pi Zero board, because you no longer need to solder pins to the header manually.