Raspberry Pi Zero W is a super-compact, hackable, and ultra-low cost computer, This is the version with built-in WiFi and Bluetooth.With BCM 2835 (32-bit ARM based processor) SoC running at 1GHz, the raspberry pi zero is faster that 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 v1.3. 99% of cases and accessories will still be fully compatible with both the Pi Zero W and v1.3 - 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. So we recommend the starter kit with:

• 1 x Raspberry Pi Zero W
• 1 x Acrylic Case for Rpi Zero/Zero W  to protect the Raspberry Pi Zero W
• 1 x 8GB microSD card with SD card adapter (Raspberry Pi Brand)
• 1 x 5V 2.5A USB Adapter to power it
• 1 x Raspberry Pi Wire Kit:
• 1 x HDMI mini to standard HDMI adapter/converter
• 1 x USB OTG cable (USB MicroB to to USB Type A receptor)
• 1 x 2x20 Header pin (For GPIO)

Pi Zero Features and Specs:

• Processor: BCM 2835 SOC
• Clock speed: 1GHz
• RAM: 512MB
• Built-in Wireless: WiFi + Bluetooth 4.1 + BLE (Bluetooth Low Energy), same as Raspberry Pi 3.
• Memory: micro-SD
• Display and Audio: mini-HDMI
• USB Port: micro-B USB for data
• Power input: micro-B USB for power
• Camera interface: CSI camera connector (needs adaptor cable, 0.5mm pitch to pitch CSI)
• GPIO: Unpopulated 40-pin GPIO connector, compatible with Raspberry Pi Zero v1.3 and Raspberry Pi 3.
• Compatibility of GPIO: Compatible with existing HAT addons
• Dimensions: 65mm x 30mm x 5mm

OK, for those that bought Raspberry Pi Zero or W and misses the accessories to get it up, here are our recommended stuff:

• A good quality 5V power supply - we suggest 5V 2.5A with cable - this will allow you to power the Zero from a wall adapter. It is not suggested to power the Zero from a computer USB port as the voltage often sags and can cause SD card corruption!
• 8GB+ microSD Card with Operating System - We do not sell this separately, you can get it easily from any PC or mobile phone store then burn in Raspbian Wheezy and update the firmware. Make sure you have the latest version!
• Mini HDMI to HDMI Adapter, or Mini HDMI to standand HDMI cable - Will let you convert the little port on the Zero to a standard sized HDMI jack. You can get 1080P HDMI video + audio out of this little computer!
• USB OTG Cable - Lets you plug in a normal USB device such as WiFi dongle, USB hub, keyboard, mouse, etc into the Zero.
• USB Console cable (UC00A or UC00C) - if you're not going to stick an HDMI monitor on there, then this is essential, you connect the wires to the GPIO pins and log in over a serial console. Its the easiest & fastest way to get on your Pi.
• 2x20 Male header strip - Solder this in to plug in Pi HATs, GPIO cables, etc as you would into a normal Pi. 

Of course if you want a better computing experience with this tiny computer, we recommend getting:

• Acrylic case for Raspberry Pi Zero/W- Cytron Raspberry Pi Zero and W Acrylic enclosure. Keeps your Pi Zero W safe and sleek.Or you can get the official Raspberry Pi Casing. 
• Mini Wireless Keyboard w/Trackpad - Requires only one USB port, which makes it a great match for the Pi Zero W
• Wireless Keyboard + Mouse set - Also requires only one USB port, but for everyday use.
• Pi T-Cobbler - When paired with the male 2x20 pin header, you can use your Pi Zero W with a breadboard to connect sensors, LEDs, motors and more!