The Matron 650V UPS, is an entry level unit, with output power rating of 390W. It can support low power consumption devices like laptop, printer decoder, TV, etc, up to the stated output capacity. Depending on the load, the backup time could be up to 15 minutes. This would be enough to save and secure your work if using a PC or to switch to a backup power generating unit. For more extended power backup (say for several hours, you should be looking at one of the inverter options).