The newly designed PowerShield DC Mini-UPS is designed to provide emergency power backup to all kinds of DC powered equipment including routers, modems (including fibre optic ONT), VOIP phone systems, surveillance equipment, alarm systems and many critical telecommunications devices. The DC Mini-UPS can economically provide hours of operation during power failure. (12,15,19,24Vdc / 36W - Output follows input voltage). Automatically detects and selects correct voltage form 15 to 24V