Official Raspberry Pi Zero W V1.1 Board 1Ghz CPU 512mb RAM 

This Raspberry Pi Zero W extends the Pi Zero family. Launched at the end of February 2017, the Pi Zero W has all the functionality of the original Pi Zero, but comes with with added connectivity, consisting of:

Specification:

• 802.11 b/g/n wireless LAN
• Bluetooth 4.1
• Bluetooth Low Energy (BLE)
• Like the Pi Zero, it also has:
• 1GHz, single-core CPU
• 512MB RAM
• Mini HDMI and USB On-The-Go ports
• Micro USB power
• HAT-compatible 40-pin header
• Composite video and reset headers
• CSI camera connector