The Netbell-K-E2M is a compact, self-contained design that was created with ease-of-use in mind. The system is built on TCP/IP platform with a built-in web server and special software designed for scheduling a bell system, all software and mounting hardware required for installation and operation are included. With the built-in web interface, you can access, control and schedule bells over a network or the Internet, no additional software or designated computer required. With the special designed BellScheduler desk app, manage & schedule multiple Netbell devices in a few clicks, making the management of your bell systems incredibly easy. It’s an ideal solution for schools, factories to build a fully automated web-based timed alert system for signaling class changes, shift rotations, breaks and any other timed signal applications. The Netbell-K-E2M features a built-in high quality 6” high volume bell (86dB) that can cover up to 8000 sqf office area, and a completely wired web-based bell controller installed within a NEMA-rated box. There are two external bell kits included in the system with CP connectors that provides quick connect/disconnect two external bells to the Netbell-K-E2M server to cover a larger area. To add the external bell to the Netbell server is incredibly easy, just connect the external bell kit with the provided bell cable, plug the bell cable to the Netbell external bell CP connector, you are all set. The external bells can be connected at 250 feet away with 18AWG cable (500 feet with 16AWG cable) to the Netbell server. With the external push button switch you can ring the bells manually in the events of emergency. It's ready to go out of the box, and you need only connect the unit to your AC outlet and an existing network with the provided power transformer and cable; it can be connected anywhere on the network and does not require a direct connection to a PC.