Keep your personal or small business PC safe from hackers with this AlphaShield hacker-proof security hardware device. AlphaShield monitors all inbound and outbound data transmissions between your computer and the outside world seamlessly while maintaining your Internet connection. The device requires no technical knowledge for setup and installation, no software install and no pesky future software patches or upgrades are necessary. Provides 24/7 online protection and is compatible with cable, XDSL, ISDN and wireless broadband. Made in USA. 3/4Hx5-1/2Wx3L".