The WarBerry Pi is a device that could be used by pen testers to collect as much information as possible in a short period of time, without being noticed. The device was designed only for academic purposes, but obviously, someone could think to use it to gather authorization from a network, for this reason, the author SecGroundZero bears no responsibility for any abuse. Once connected the device to the target network, it has the capability to remain silent and collect information on the internal traffic by collecting IPs, MAC addresses and hostnames.”]
Source: https://securityaffairs.co/wordpress/48465/hacking/warberrypi-tactical-exploitation-device.html