The RT Systems RT650VA is a compact, entry-level line-interactive UPS designed for basic backup power on a single device. It's a simple, affordable way to protect a PC, router or modem, or small POS terminal from power cuts and voltage fluctuations, without the cost of a full online double-conversion system. A good starting point for anyone who just needs to keep one critical device running for a short period during an outage. Price excludes VAT.