This is a 240v Power Supply for the Raspberry Pi. It has an output capacity of 2,500mA, and an integrated 1.8 meter cable with micro-USB plug and power switch. It powers all models of Raspberry Pi and peripherals.
This adapter plugs into the mini HDMI port on your Raspberry Pi Zero W or Pi Zero and allows you to plug a standard HDMI cable in. It is necessary for connecting a HDMI display to your Raspberry Pi Zero W.
The Raspberry Pi Zero W adds on-board WiFi to the functionality of the Raspberry Pi Zero. It has a micro SD card slot, a mini HDMI port, two micro USB ports (one for power, one for USB), and 512MB of RAM, and is powered by a single-core 1 GHz processor chip.