I am the original owner of this device. It is a Broadband sharing gateway for DSL/Cable service connection. I connected it between my cable modem and my WiFi router. I used it to replace a cheaper hardware firewall device for home use that seemed to be designed "for dummies" - it allowed no detailed setup. In contrast, the ZyWALL allowed me the flexibility to block or allow specific protocol ports, etc. It was more like the enterprise security routers from Cisco that I had once administered. In spite of that, it is easy to use if you don't want to deal with such details. The ZyWALL 10 supports Stateful Inspection, Denial of Service(DoS) detection and prevention. The item is in excellent electrical and physical condition. Protective film is still in place over the status LED's. The power supply and software CD are included along with the ZyWALL 10 hardware box in the original box. Double boxing will be achieved by adding an outer box.