The 8WD4408-0AA with Signallers accessories is a base manufactured by Siemens. It is used in components such as circuit breakers, relays, and motor control centers. It is capable of communicating with other components through relays and other standard communication methods. The base comes with all the necessary accessories needed to install and use the base, including a power supply, a signal transmitter and receiver, signal and power cables, connection terminals, and a mounting adapter. It is designed for use in harsh environments and is suitable for use in Class 1, Div. 2 rated installations.