APC Back-UPS CS 500VA provides professional-grade power protection for office and home office systems. Battery powered & surge protected power outlets, built-in phone/fax/modem line (DSL compatible) protection, safe system shutdown software with sophisticated power management features and pro-active audio-visual status indicators ensure office systems and their valuable data are protected from dangerous power surges, spikes and blackouts. Serial or USB connectivity gives users more flexibility making installation quicker and easier. Easy access to a hot-swappable, user-replaceable battery also makes servicing the Back-UPS CS hassle-free. These features along with its classic styling make the Back-UPS CS a perfect choice for protecting your important office and home office systems.