Offline UPS features:
1.Advanced PWM technology and frequency conversion digital design for the back-up output.
2.AVR function.
3.Perfect automatic protection against extremely high or low voltages,overload,over-current,short circuit,or low battery.
4.RJ45/11 for telephone,fax and modem circuit protection(only for model "B")
5.Smart RS232 interface for automatic file saving and power-off functions at your computer(only for model “B”)
6.Advanced battery management system,with automatic re-charging function
7.Special surge suppression output sockets.Laser printer connection available(only for model over 1000VA)