The OS required is Kali Linux with at least 2 GB of RAM recommended and 20-40 GB of hard disk space.
The hardware needed for the device would be a RTLSDR device for Chapter 10, Playing with Software-Defined Radios and any of the devices mentioned in the following link for Chapter 11, Kali in Your Pocket – NetHunters and Raspberries:
https://www.offensive-security.com/kali-linux-nethunter-download/
We also require Alfa card for Chapter 6, Wireless Attacks – Getting Past Aircrack-ng.