APC Back-UPS RS 1100 line-interactive uninterruptible power supply — 1100VA / 660W, 230V — with battery-backup and surge-protected outlets plus phone/fax line protection. Keeps your PC, router, TV or decoder running through load-shedding and power dips. Tested working. Sold as the unit only; as with any used UPS the internal battery is a wear item and may eventually need replacing.