The Raspberry Pi Zero is half the size of a Model A+, with twice the utility. A tiny Raspberry Pi that’s affordable enough for any project!

- 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

https://www.raspberrypi.org/products/pi-zero/