Linortek Netbell-2-2Bel Network Loud Electric School Factory Warehouse Break Alarm Bell System Automatic Programmable Bell Timer Software Electronic Bell System COMPACT AND SELF-CONTAINED: Network enabled, all-in-one automatic bell controller with the hardware and software you need to control your timed alert system. No extra software or designated computer required. Adding schedules from any computer on your network without having to go through the firewall FULLY PROGRAMMABLE: Up to 500 programmable event schedules, each event can be set to a different duration for different break time. Create different schedules for different events in a txt format and switch the schedules as needed with a few clicks EASY TO USE: With the built-in remote function and BellScheduler desk app, you can manage & schedule multiple Netbell devices whether in a single building, multiple buildings or multiple locations from one easy-to-use interface, without the need of logging in to each device or hard-wiring the bells to a central control station, making the management of your bell systems incredibly easy EASY TO INSTALL: Use as either a network or a standalone device, connect to network or directly to computer for initial setup then it will work as scheduled. With the built-in Real Time Clock and user settable NTP server, you can accurate control of when the bells ring (HH:MM:SS, MM/DD/YYYY, SUNDAY-SATURDAY) or pull the time from your existing NTP server EASY TO EXPAND: The Netbell-2 bell controller has 2 dry contact relays (1-Form-A relays 110/220@10A) that allow you to control up to 2 line voltage bells/buzzers or other timed signal equipment, with the remote function and BellScheduler App, you can add multiple bell systems as needed that can share the same schedules or add different schedules