The Vision range is available in models from 800 VA to 2000 VA and uses Line Interactive (Voltage Independent) technology. The load is powered from the mains through an Automatic Voltage Regulator to stabilise brownout, sag and surge voltages, and EMI filters suppress spikes and transients.The Vision range have a backlit LCD display providing UPS status information re load and battery performance. With its advanced communications and connectivity options Vision is the ideal solution for installations requiring superior protection and versatility in power supply backup system.such as for the protection of peripheral network devices and servers. Model numbers include VST800 (800VA), VST1100 (1100VA), VST1500 (1500VA), VST2000 (2000VA)