BadUSB MITM (main in the middle) attacks = Plugin Nethunter to a victim PC, and have your traffic relayed through it.
USB HID (human interface device) Keyboard attacks = much like the Teensy device can do.
All Kali Linux toolset with many tools available via a graphical menu system.
802.11 Wireless Injection & AP mode support = multiple supported USB wifi cards for wireless attacks.
Kali Linuxcore chroot environment in your android. But in rooted and officially supported devices it gives extra functionality because official nethunter installer contains a moded custom kernel patched for penetration testing. Kali Nethunter is available for rooted and unrooted Android devices. Kali Nethunter is an android ROM by offensive security, it is an open-source android penetration testing platform based on Kali Linux.