What's on the board?
The original Zero, launched back in November 2015, will remain on sale alongside the Zero W.
Apart from the added support for Wi-Fi and Bluetooth, the Zero W has the same specs as the most recent revision of the Zero.
On the far left of the board is the microSD card slot, in the center is the Elpida memory chip providing 512MB of LPDDR2 SDRAM, which sits on top of the single-core 1GHz, 32-bit Broadcom BCM2835 processor–based on the ARMv6 architecture.
At top of the board is an unpopulated 40-pin header, which can be used to allow the Zero W to interact with other electronic hardware, but you’ll need to solder a pin header in place.
The board also has the same wireless radio chip found on the Pi 3. On the far right of the Zero W is the CSI camera connector, for hooking up the official Raspberry Pi Camera.