The AXIS C1004-E is a complete high quality complete audio system in one unit. There is no need for an amplifier, mixer, digital signal processor, streaming functions, microphone, or power supply as everything is integrated. And it comes preconfigured, so you don't need a sound expert to install it. In other words, the AXIS C1004-E just works, and sounds great, right out of the box. Plus, with its built-in speaker self-test feature, you can be sure it will continue to work. The AXIS C1004-E connects to your existing IP network and operates on a single power cable via Ethernet.