SMART500RT1UN is a line interactive UPS. This offers complete power protection for small network applications, including telecom, security and digital signage. The smartpro® line-interactive UPS system with AVR protection provides reliable battery backup and AC power protection against blackouts, brownouts, surges and line noise that can damage valuable electronics, destroy data. The 120V battery backup is ideal protection for point-of-sale and kiosk applications, a small business VoIP network, or rack-mount equipment in user server room or network closet. Backup support allows user to work through short power failures and gives you enough time to safely save files and shut down user system in case of a prolonged blackout. Backup time varies according to load, but the line-interactive UPS system should keep a half load (150W) powered as long as 14 minutes and a full load (300W) up to three minutes.