This is a single BBC microbit kit, comes with a USB cable, AAA batteries, and AAA battery holder. Your BBC micro:bit will come in one of 4 colour schemes, unfortunately it is not possible to specify which colour you will receive. 
 
The BBC micro:bit is a powerful hand-held, fully programmable, computer designed by the BBC and a number of partners to encourage children to get actively involved in writing software and building new things that will be controlled by it. Write your code using one of the easy to use editors provided on the BBC micro:bit website, connect your BBC micro:bit to your computer via USB press the compile button in the editor and then drop the downloaded file directly onto your BBC micro:bit. There is also an App for Android devices.
 
Wirelessly connect and interact with the world around you. Use Bluetooth Low Energy to connect to mobile phones and tablets, take a selfie or drive the music in your playlists.
 
The BBC micro:bit is the spiritual successor of the BBC Micro of the 1980s, which itself introduced a generation of children to computing. The BBC micro:bit carries on this 30 year tradition and does it 18 times faster and is 70 times smaller than its predecessor. 
 
Based around a 32 bit ARM Cortex-M0 processor, the BBC micro:bit also features on board accelerometer and compass sensors, Bluetooth Low Energy and USB connectivity, a display consisting of 25 LEDs, two programmable buttons and it can be powered by either USB or an external battery pack. The device inputs and outputs are through five ring connectors that are part of the 21-pin edge connector.