Raspberry Pi Zero W is a super-compact, hackable, and ultra-low-cost computer, This is the version with built-in WiFi and Bluetooth, and there is no so call clone version of this super low-cost computer, this is the original Raspberry Pi Zero W from Raspberrypi.org.
With BCM 2835 (32-bit ARM-based processor) SoC running at 1GHz, the raspberry pi zero is faster than Raspberry Pi 1. With mini-HDMI, micro-B OTG USB, and the same 40-pin GPIO it still has great connectivity although you’ll probably need some accessories to help you hook it up to your existing devices.
The best part about all this is that the Pi Zero W keeps the same shape, connectors, and mounting holes as the Pi Zero. 99% of cases and accessories will still be fully compatible with both the Pi Zero W – though if you have a case with a metal top there might be some WiFi chip difficulties.
Yes, it is really attractive, but do bear in mind that you need additional accessories to get it running. At least USB adapter and microSD card is a must.
Features of Raspberry Pi Zero-W Development Board:
1GHz, single-core CPU
Micro-USB On-The-Go port
HAT-compatible 40-pin header
Composite video and reset headers
CSI camera connector
802.11n wireless LAN
Specifications of Raspberry Pi Zero-W Development Board:
Processor: BCM 2835 SOC
Clock speed: 1GHz
Display and Audio: mini-HDMI
USB Port: 1 x Micro-B USB for data (with power too)
Power input: 1x micro-B USB for power (no data)
Camera interface: CSI camera connector (needs adaptor cable, 0.5mm pitch to pitch CSI)
GPIO: Unpopulated 40-pin GPIO connector
Compatibility of GPIO: Compatible with existing HAT addons