Without Bluetooth & WIFI

For a Zero and an ordinary keyboard and mouse, a 1 Amp supply is sufficient. If you will be using power hungry USB peripherals without a powered USB hub then a 2 Amp supply is advisable.
Must have - a microSD card with an operating system and a high-quality 5V power supply to power your board
At the heart of the Raspberry Pi Zero is a 1GHz BCM2835 single-coreprocessor, the same as the B and A , with 512MB RAM

If you didn't think that the Raspberry Pi Zero could possibly get any better; boy do we have a pleasant surprise for you! The new Raspberry Pi Zero offers all the benefits of the Pi Zero v1.3; but with one big difference built-in Wi-Fi! More specifically; this giant upgrade is the addition of a BCM43143 Wi-Fi chip BUILT-IN to your Raspberry Pi zero just like the Pi 3! No more pesky Wi-Fi adapters - this Pi is Wi-Fi ready. There's also Bluetooth Low Energy (BLE) on board making the Pi an excellent IoT solution (BLE support is still in the works; software-wise). We also have a basic pack; budget pack and starter pack with all the essentials to get your Zero 1.3 up and running. At first glance; the Pi zero W looks just like the Raspberry Pi zero v1.3 we know and love. But when we started to think of the added convenience of not having to worry about hooking up a Wi-Fi dongle or Ethernet cable - and what a well-chosen set of accessories could add - we realized the appeal. And then we saw the price...could it be true Yes! This is the slimmest; most pared down Raspberry Pi to date. It's kind of like the little cousin to the Pi 3 - with just a micro SD card slot; a mini HDMI port; two micro USB ports (one for power; one for USB); and 512MB of RAM. It has a single-core 1 GHz processor chip; similar to the Pi A and B . The best part about all this is that the Pi zero 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 and v1.3 - though if you have a case with a metal top there might be some Wi-Fi chip difficulties.